Check DNS, Urls + Redirects, Certificates and Content of your Website




1. IP-Addresses

HostTypeIP-Addressis auth.∑ Queries∑ Timeout
chi-chu.tschang.net
A
52.52.105.85
San Jose/California/United States (US) - Amazon.com, Inc.
Hostname: ec2-52-52-105-85.us-west-1.compute.amazonaws.com
yes
1
0

A
54.177.68.202
San Jose/California/United States (US) - Amazon.com, Inc.
Hostname: ec2-54-177-68-202.us-west-1.compute.amazonaws.com
yes
1
0

AAAA

yes


www.chi-chu.tschang.net

Name Error
yes
1
0
*.tschang.net
A
Refused
yes



AAAA
Refused
yes



CNAME
Refused
yes


*.chi-chu.tschang.net
A
Name Error
yes



AAAA
Name Error
yes



CNAME
Name Error
yes



2. DNSSEC

Zone (*)DNSSEC - Informations

Zone: (root)
(root)
1 DS RR published



DS with Algorithm 8, KeyTag 20326, DigestType 2 and Digest 4G1EuAuPHTmpXAsNfGXQhFjogECbvGg0VxBCN8f47I0=



Status: Valid because published



3 DNSKEY RR found



Public Key with Algorithm 8, KeyTag 20326, Flags 257 (SEP = Secure Entry Point)



Public Key with Algorithm 8, KeyTag 46594, Flags 256



Public Key with Algorithm 8, KeyTag 48903, Flags 256



1 RRSIG RR to validate DNSKEY RR found



RRSIG-Owner (root), Algorithm: 8, 0 Labels, original TTL: 172800 sec, Signature-expiration: 11.07.2020, 00:00:00 +, Signature-Inception: 20.06.2020, 00:00:00 +, KeyTag 20326, Signer-Name: (root)



Status: Good - Algorithmus 8 and DNSKEY with KeyTag 20326 used to validate the DNSKEY RRSet



Status: Valid Chain of trust. Parent-DS with Algorithm 8, KeyTag 20326, DigestType 2 and Digest "4G1EuAuPHTmpXAsNfGXQhFjogECbvGg0VxBCN8f47I0=" validates local Key with the same values, Key ist Secure Entry Point (SEP) of the zone

Zone: net
net
1 DS RR in the parent zone found



DS with Algorithm 8, KeyTag 35886, DigestType 2 and Digest eGKyf19Rbr4ZaARE1M5edimBkxhCxGXwAjZAHYvZc+4=



1 RRSIG RR to validate DS RR found



RRSIG-Owner net., Algorithm: 8, 1 Labels, original TTL: 86400 sec, Signature-expiration: 08.07.2020, 05:00:00 +, Signature-Inception: 25.06.2020, 04:00:00 +, KeyTag 48903, Signer-Name: (root)



Status: Good - Algorithmus 8 and DNSKEY with KeyTag 48903 used to validate the DS RRSet in the parent zone



2 DNSKEY RR found



Public Key with Algorithm 8, KeyTag 35886, Flags 257 (SEP = Secure Entry Point)



Public Key with Algorithm 8, KeyTag 36059, Flags 256



1 RRSIG RR to validate DNSKEY RR found



RRSIG-Owner net., Algorithm: 8, 1 Labels, original TTL: 86400 sec, Signature-expiration: 08.07.2020, 16:28:30 +, Signature-Inception: 23.06.2020, 16:23:30 +, KeyTag 35886, Signer-Name: net



Status: Good - Algorithmus 8 and DNSKEY with KeyTag 35886 used to validate the DNSKEY RRSet



Status: Valid Chain of trust. Parent-DS with Algorithm 8, KeyTag 35886, DigestType 2 and Digest "eGKyf19Rbr4ZaARE1M5edimBkxhCxGXwAjZAHYvZc+4=" validates local Key with the same values, Key ist Secure Entry Point (SEP) of the zone

Zone: tschang.net
tschang.net
0 DS RR in the parent zone found



DS-Query in the parent zone has a valid NSEC3 RR as result with the hashed query name "l3t25unhop47o60qpm9m1m6iam6ighmg" between the hashed NSEC3-owner "l3soqotns6vvftr259u8e5skeciltgbj" and the hashed NextOwner "l3tcu62ojcjnp4bsme99t165qhrieakn". So the parent zone confirmes the not-existence of a DS RR.
Bitmap: NS, DS, RRSIG Validated: RRSIG-Owner l3soqotns6vvftr259u8e5skeciltgbj.net., Algorithm: 8, 2 Labels, original TTL: 86400 sec, Signature-expiration: 30.06.2020, 06:25:43 +, Signature-Inception: 23.06.2020, 05:15:43 +, KeyTag 36059, Signer-Name: net



DS-Query in the parent zone sends valid NSEC3 RR with the Hash "a1rt98bs5qgc9nfi51s9hci47uljg6jh" as Owner. That's the Hash of "net" with the NextHashedOwnerName "a1ruuffjkct2q54p78f8ejgj8jbk7i8b". So that domain name is the Closest Encloser of "tschang.net". Opt-Out: True.
Bitmap: NS, SOA, RRSIG, DNSKEY, NSEC3PARAM Validated: RRSIG-Owner a1rt98bs5qgc9nfi51s9hci47uljg6jh.net., Algorithm: 8, 2 Labels, original TTL: 86400 sec, Signature-expiration: 30.06.2020, 06:35:03 +, Signature-Inception: 23.06.2020, 05:25:03 +, KeyTag 36059, Signer-Name: net



0 DNSKEY RR found




Zone: chi-chu.tschang.net
chi-chu.tschang.net
0 DS RR in the parent zone found



0 DNSKEY RR found




Zone: www.chi-chu.tschang.net
www.chi-chu.tschang.net
0 DS RR in the parent zone found


3. Name Servers

DomainNameserverNS-IP
www.chi-chu.tschang.net
  ns-300.awsdns-37.com

chi-chu.tschang.net
  ns-1100.awsdns-09.org / 4b65f8097a21711bd312c3a7a90557c5 -
205.251.196.76
Seattle/Washington/United States (US) - Amazon.com, Inc.


 
2600:9000:5304:4c00::1
Seattle/Washington/United States (US) - Amazon.com


  ns-1931.awsdns-49.co.uk / a0f37f80c2a5a1df0ab8f5f3437d716b -
205.251.199.139
Chicago/Illinois/United States (US) - Amazon.com, Inc.


 
2600:9000:5307:8b00::1
Seattle/Washington/United States (US) - Amazon.com


  ns-300.awsdns-37.com / 5d38fe7885f18a328c02acd32e66350e -
2600:9000:5301:2c00::1
Seattle/Washington/United States (US) - Amazon.com


  ns-759.awsdns-30.net / c99c6bfa5e3c1e4d6760f6b5cbd2703e -
205.251.194.247
Seattle/Washington/United States (US) - Amazon.com, Inc.


 
2600:9000:5302:f700::1
Seattle/Washington/United States (US) - Amazon.com

tschang.net
  ns-1067.awsdns-05.org
205.251.196.43
Seattle/Washington/United States (US) - Amazon.com, Inc.


 
2600:9000:5304:2b00::1
Seattle/Washington/United States (US) - Amazon.com


  ns-1100.awsdns-09.org
205.251.196.76
Seattle/Washington/United States (US) - Amazon.com, Inc.


 
2600:9000:5304:4c00::1
Seattle/Washington/United States (US) - Amazon.com


  ns-1172.awsdns-18.org / 4b134fad9018c1bff27ca5999d451b4a -
205.251.196.148
Seattle/Washington/United States (US) - Amazon.com, Inc.


 
2600:9000:5304:9400::1
Seattle/Washington/United States (US) - Amazon.com


  ns-1834.awsdns-37.co.uk / 41c16ca1e5df8fe1332eda5cef7230d9 -
205.251.199.42
Chicago/Illinois/United States (US) - Amazon.com, Inc.


 
2600:9000:5307:2a00::1
Seattle/Washington/United States (US) - Amazon.com


  ns-1931.awsdns-49.co.uk
205.251.199.139
Chicago/Illinois/United States (US) - Amazon.com, Inc.


 
2600:9000:5307:8b00::1
Seattle/Washington/United States (US) - Amazon.com


  ns-1964.awsdns-53.co.uk
205.251.199.172
Chicago/Illinois/United States (US) - Amazon.com, Inc.


  ns-300.awsdns-37.com
205.251.193.44
Chicago/Illinois/United States (US) - Amazon.com, Inc.


 
2600:9000:5301:2c00::1
Seattle/Washington/United States (US) - Amazon.com


  ns-345.awsdns-43.com
205.251.193.89
Chicago/Illinois/United States (US) - Amazon.com, Inc.


 
2600:9000:5301:5900::1
Seattle/Washington/United States (US) - Amazon.com


  ns-629.awsdns-14.net
205.251.194.117
Seattle/Washington/United States (US) - Amazon.com, Inc.


  ns-759.awsdns-30.net
205.251.194.247
Seattle/Washington/United States (US) - Amazon.com, Inc.


 
2600:9000:5302:f700::1
Seattle/Washington/United States (US) - Amazon.com


  ns-80.awsdns-10.com / 8bc380c62c6051207f7c8ac63fcce98c -
205.251.192.80
Chicago/Illinois/United States (US) - Amazon.com, Inc.


 
2600:9000:5300:5000::1
Seattle/Washington/United States (US) - Amazon.com


  ns-994.awsdns-60.net / 13a53454be0096060822812b0d34896e -
205.251.195.226
Seattle/Washington/United States (US) - Amazon.com, Inc.


 
2600:9000:5303:e200::1
Seattle/Washington/United States (US) - Amazon.com

net
  a.gtld-servers.net


  b.gtld-servers.net


  c.gtld-servers.net


  d.gtld-servers.net


  e.gtld-servers.net


  f.gtld-servers.net


  g.gtld-servers.net


  h.gtld-servers.net


  i.gtld-servers.net


  j.gtld-servers.net


  k.gtld-servers.net


  l.gtld-servers.net


  m.gtld-servers.net


4. SOA-Entries


Domain:net
Zone-Name:net
Primary:a.gtld-servers.net
Mail:nstld.verisign-grs.com
Serial:1593064125
Refresh:1800
Retry:900
Expire:604800
TTL:86400
num Entries:2


Domain:net
Zone-Name:net
Primary:a.gtld-servers.net
Mail:nstld.verisign-grs.com
Serial:1593064140
Refresh:1800
Retry:900
Expire:604800
TTL:86400
num Entries:11


Domain:tschang.net
Zone-Name:
Primary:
Mail:
Serial:
Refresh:
Retry:
Expire:
TTL:
num Entries:14


Domain:tschang.net
Zone-Name:tschang.net
Primary:ns-80.awsdns-10.com
Mail:awsdns-hostmaster.amazon.com
Serial:1
Refresh:7200
Retry:900
Expire:1209600
TTL:86400
num Entries:8


Domain:chi-chu.tschang.net
Zone-Name:chi-chu.tschang.net
Primary:ns-300.awsdns-37.com
Mail:awsdns-hostmaster.amazon.com
Serial:1
Refresh:7200
Retry:900
Expire:1209600
TTL:86400
num Entries:7


Domain:www.chi-chu.tschang.net
Zone-Name:
Primary:
Mail:
Serial:
Refresh:
Retry:
Expire:
TTL:
num Entries:1


5. Screenshots

Startaddress: https://chi-chu.tschang.net, address used: https://chi-chu.tschang.net/, Screenshot created 2020-07-27 03:35:59 +00:0

Mobil (412px x 732px)

710 milliseconds

Screenshot mobile - https://chi-chu.tschang.net/
Mobil + Landscape (732px x 412px)

722 milliseconds

Screenshot mobile landscape - https://chi-chu.tschang.net/
Screen (1280px x 1680px)

2277 milliseconds

Screenshot Desktop - https://chi-chu.tschang.net/

Mobile- and other Chrome-Checks

widthheight
visual Viewport412732
content Size412732

Good: No horizontal scrollbar. Content-size width = visual Viewport width.

Chrome-Connection: secure. secure connection settings. The connection to this site is encrypted and authenticated using TLS 1.2, ECDHE_RSA with P-256, and AES_128_GCM.

Chrome-Resources : secure. all served securely. All resources on this page are served securely.

6. Url-Checks


:

:
DomainnameHttp-StatusredirectSec.G
• http://chi-chu.tschang.net/
52.52.105.85
301
https://chi-chu.tschang.net/
Html is minified: 109.03 %
0.337
A
Content-Type: text/html
Date: Thu, 25 Jun 2020 05:51:39 GMT
Location: https://chi-chu.tschang.net/
Server: nginx/1.16.1
Content-Length: 169
Connection: Close

• http://chi-chu.tschang.net/
54.177.68.202
301
https://chi-chu.tschang.net/
Html is minified: 109.03 %
0.343
A
Content-Type: text/html
Date: Thu, 25 Jun 2020 05:51:39 GMT
Location: https://chi-chu.tschang.net/
Server: nginx/1.16.1
Content-Length: 169
Connection: Close

• https://chi-chu.tschang.net/
52.52.105.85 GZip used - 2242 / 5995 - 62.60 %
Inline-JavaScript (∑/total): 4/544 Inline-CSS (∑/total): 0/0
200

Html is minified: 130.47 %
4.853
B
small visible content (num chars: 362)
learning: Kremen School of Education and Human Development, Fresno State teaching: Albany High School reading : Kitchen Confidential: Adventures in the Culinary Underbelly by Anthony Bourdain writing : A French Water Company's Cautionary Tale in China The New E-spionage Threat Dangerous Fakes The Squeeze at China's Baidu Empty Seats at China's Sellout Olympics
Content-Encoding: gzip
Content-Type: text/html; charset=utf-8
Date: Thu, 25 Jun 2020 05:51:40 GMT
ETag: W/"176b-jasJkBipEvvODm8djV1PC60/yJc"
Server: nginx/1.16.1
X-Powered-By: Express
Content-Length: 2242
Connection: Close

• https://chi-chu.tschang.net/
54.177.68.202 GZip used - 2242 / 5995 - 62.60 %
Inline-JavaScript (∑/total): 4/544 Inline-CSS (∑/total): 0/0
200

Html is minified: 130.47 %
4.847
B
small visible content (num chars: 362)
learning: Kremen School of Education and Human Development, Fresno State teaching: Albany High School reading : Kitchen Confidential: Adventures in the Culinary Underbelly by Anthony Bourdain writing : A French Water Company's Cautionary Tale in China The New E-spionage Threat Dangerous Fakes The Squeeze at China's Baidu Empty Seats at China's Sellout Olympics
Content-Encoding: gzip
Content-Type: text/html; charset=utf-8
Date: Thu, 25 Jun 2020 05:51:45 GMT
ETag: W/"176b-jasJkBipEvvODm8djV1PC60/yJc"
Server: nginx/1.16.1
X-Powered-By: Express
Content-Length: 2242
Connection: Close

• http://chi-chu.tschang.net/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
52.52.105.85
Inline-JavaScript (∑/total): 0/0 Inline-CSS (∑/total): 0/0
301
https://chi-chu.tschang.net/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
Html is minified: 109.03 %
0.340
A
Visible Content: 301 Moved Permanently nginx/1.16.1
Content-Type: text/html
Date: Thu, 25 Jun 2020 05:51:50 GMT
Location: https://chi-chu.tschang.net/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
Server: nginx/1.16.1
Content-Length: 169
Connection: Close

• http://chi-chu.tschang.net/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
54.177.68.202
Inline-JavaScript (∑/total): 0/0 Inline-CSS (∑/total): 0/0
301
https://chi-chu.tschang.net/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
Html is minified: 109.03 %
0.334
A
Visible Content: 301 Moved Permanently nginx/1.16.1
Content-Type: text/html
Date: Thu, 25 Jun 2020 05:51:50 GMT
Location: https://chi-chu.tschang.net/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
Server: nginx/1.16.1
Content-Length: 169
Connection: Close

• https://chi-chu.tschang.net/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
GZip used - 1712 / 4283 - 60.03 %
Inline-JavaScript (∑/total): 4/544 Inline-CSS (∑/total): 0/0
404

Html is minified: 136.05 %
4.787
A
Not Found
Visible Content: home resume learning reading projects 404 Error. This is not the webpage you are looking for.
Info: Html-Content with meta and/or script, may be a problem creating a Letsencrypt certificate using http-01 validation
Content-Encoding: gzip
Content-Type: text/html; charset=utf-8
Date: Thu, 25 Jun 2020 05:52:02 GMT
ETag: W/"10bb-z6kDO2No1/eXPyFSATtGK4f+tYE"
Server: nginx/1.16.1
X-Powered-By: Express
Content-Length: 1712
Connection: Close

• https://52.52.105.85/
52.52.105.85 GZip used - 2242 / 5995 - 62.60 %
Inline-JavaScript (∑/total): 4/544 Inline-CSS (∑/total): 0/0
200

Html is minified: 130.47 %
4.754
N
Certificate error: RemoteCertificateNameMismatch
small visible content (num chars: 362)
learning: Kremen School of Education and Human Development, Fresno State teaching: Albany High School reading : Kitchen Confidential: Adventures in the Culinary Underbelly by Anthony Bourdain writing : A French Water Company's Cautionary Tale in China The New E-spionage Threat Dangerous Fakes The Squeeze at China's Baidu Empty Seats at China's Sellout Olympics
Content-Encoding: gzip
Content-Type: text/html; charset=utf-8
Date: Thu, 25 Jun 2020 05:51:51 GMT
ETag: W/"176b-jasJkBipEvvODm8djV1PC60/yJc"
Server: nginx/1.16.1
X-Powered-By: Express
Content-Length: 2242
Connection: Close

• https://54.177.68.202/
54.177.68.202 GZip used - 2242 / 5995 - 62.60 %
Inline-JavaScript (∑/total): 4/544 Inline-CSS (∑/total): 0/0
200

Html is minified: 130.47 %
4.850
N
Certificate error: RemoteCertificateNameMismatch
small visible content (num chars: 362)
learning: Kremen School of Education and Human Development, Fresno State teaching: Albany High School reading : Kitchen Confidential: Adventures in the Culinary Underbelly by Anthony Bourdain writing : A French Water Company's Cautionary Tale in China The New E-spionage Threat Dangerous Fakes The Squeeze at China's Baidu Empty Seats at China's Sellout Olympics
Content-Encoding: gzip
Content-Type: text/html; charset=utf-8
Date: Thu, 25 Jun 2020 05:51:56 GMT
ETag: W/"176b-jasJkBipEvvODm8djV1PC60/yJc"
Server: nginx/1.16.1
X-Powered-By: Express
Content-Length: 2242
Connection: Close

7. Comments


1. General Results, most used to calculate the result

Aname "chi-chu.tschang.net" is subdomain, public suffix is ".net", top-level-domain is ".net", top-level-domain-type is "generic", tld-manager is "VeriSign Global Registry Services"
Agood: All ip addresses are public addresses
AGood: Minimal 2 ip addresses per domain name found: chi-chu.tschang.net has 2 different ip addresses (authoritative).
Warning: No ipv6 address found. Ipv6 is the future with a lot of new features. So every domain name should have an ipv6 address. See https://en.wikipedia.org/wiki/IPv6: chi-chu.tschang.net has no ipv6 address.
Agood: No asked Authoritative Name Server had a timeout
ADNS: "Name Error" means: No www-dns-entry defined. This isn't a problem
Agood: destination is https
Agood - only one version with Http-Status 200
Agood: one preferred version: non-www is preferred
AHSTS-Preload-Status: Preloaded. Check https://hstspreload.org/ to learn some basics about the Google-Preload-List.
AGood: All urls with http status 200/404 have a complete Content-Type header (MediaType / MediaSubType + correct charset)
Ahttp://chi-chu.tschang.net/ 52.52.105.85
301
https://chi-chu.tschang.net/
correct redirect http - https with the same domain name
Ahttp://chi-chu.tschang.net/ 54.177.68.202
301
https://chi-chu.tschang.net/
correct redirect http - https with the same domain name
Bhttps://chi-chu.tschang.net/ 52.52.105.85
200

Missing HSTS-Header
Bhttps://chi-chu.tschang.net/ 54.177.68.202
200

Missing HSTS-Header
Bhttps://52.52.105.85/ 52.52.105.85
200

Missing HSTS-Header
Bhttps://54.177.68.202/ 54.177.68.202
200

Missing HSTS-Header
Ihttps://chi-chu.tschang.net/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
404

Content problems or problems with resources included - http links, files doesn't exist, different Content-Type definitions. Check the Html-Content - Part.
Nhttps://52.52.105.85/ 52.52.105.85
200

Error - Certificate isn't trusted, RemoteCertificateNameMismatch
Nhttps://54.177.68.202/ 54.177.68.202
200

Error - Certificate isn't trusted, RemoteCertificateNameMismatch
XFatal error: Nameserver doesn't support TCP connection: ns-1067.awsdns-05.org / 205.251.196.43: Refused
XFatal error: Nameserver doesn't support TCP connection: ns-1067.awsdns-05.org / 2600:9000:5304:2b00::1: Refused
XFatal error: Nameserver doesn't support TCP connection: ns-1100.awsdns-09.org / 205.251.196.76: Refused
XFatal error: Nameserver doesn't support TCP connection: ns-1100.awsdns-09.org / 2600:9000:5304:4c00::1: Refused
XFatal error: Nameserver doesn't support TCP connection: ns-1931.awsdns-49.co.uk / 205.251.199.139: Refused
XFatal error: Nameserver doesn't support TCP connection: ns-1931.awsdns-49.co.uk / 2600:9000:5307:8b00::1: Refused
XFatal error: Nameserver doesn't support TCP connection: ns-1964.awsdns-53.co.uk / 205.251.199.172: Refused
XFatal error: Nameserver doesn't support TCP connection: ns-300.awsdns-37.com / 205.251.193.44: Refused
XFatal error: Nameserver doesn't support TCP connection: ns-300.awsdns-37.com / 2600:9000:5301:2c00::1: Refused
XFatal error: Nameserver doesn't support TCP connection: ns-345.awsdns-43.com / 205.251.193.89: Refused
XFatal error: Nameserver doesn't support TCP connection: ns-345.awsdns-43.com / 2600:9000:5301:5900::1: Refused
XFatal error: Nameserver doesn't support TCP connection: ns-629.awsdns-14.net / 205.251.194.117: Refused
XFatal error: Nameserver doesn't support TCP connection: ns-759.awsdns-30.net / 205.251.194.247: Refused
XFatal error: Nameserver doesn't support TCP connection: ns-759.awsdns-30.net / 2600:9000:5302:f700::1: Refused
AGood: More then one ip address per domain name found, checking all ip addresses the same http status and the same certificate found: Domain chi-chu.tschang.net, 2 ip addresses.
Info: Checking all ip addresses of that domain without sending the hostname only one certificate found. Checking all ip addresses and sending the hostname only one certificate found. Both certificates are the same. So that domain doesn't require Server Name Indication (SNI), it's the primary certificate of that set of ip addresses.: Domain chi-chu.tschang.net, 2 ip addresses, 1 different http results.

2. DNS- and NameServer - Checks

AInfo:: 16 Root-climbing DNS Queries required to find all IPv4- and IPv6-Addresses of 4 Name Servers.
AInfo:: 16 Queries complete, 16 with IPv6, 0 with IPv4.
AGood: All DNS Queries done via IPv6.
Ok (4 - 8):: An average of 4.0 queries per domain name server required to find all ip addresses of all name servers.
AInfo:: 4 different Name Servers found: ns-1100.awsdns-09.org, ns-1931.awsdns-49.co.uk, ns-300.awsdns-37.com, ns-759.awsdns-30.net, 4 Name Servers included in Delegation: ns-1100.awsdns-09.org, ns-1931.awsdns-49.co.uk, ns-300.awsdns-37.com, ns-759.awsdns-30.net, 4 Name Servers included in 1 Zone definitions: ns-1100.awsdns-09.org, ns-1931.awsdns-49.co.uk, ns-300.awsdns-37.com, ns-759.awsdns-30.net, 1 Name Servers listed in SOA.Primary: ns-300.awsdns-37.com.
AGood: Only one SOA.Primary Name Server found.: ns-300.awsdns-37.com.
AGood: SOA.Primary Name Server included in the delegation set.: ns-300.awsdns-37.com.
AGood: Consistency between delegation and zone. The set of NS records served by the authoritative name servers must match those proposed for the delegation in the parent zone. Ordered list of name servers: ns-1100.awsdns-09.org, ns-1931.awsdns-49.co.uk, ns-300.awsdns-37.com, ns-759.awsdns-30.net
AGood: All Name Server Domain Names have a Public Suffix.
AGood: All Name Server Domain Names ending with a Public Suffix have minimal one IPv4- or IPv6 address.
AGood: All Name Server ip addresses are public.
AGood: Minimal 2 different name servers (public suffix and public ip address) found: 4 different Name Servers found
AGood: Name servers with different Top Level Domains / Public Suffix List entries found: 4 Name Servers, 4 Top Level Domains: org, net, com, co.uk
AGood: Name Servers with different domain names found.: 4 different Domains found
Warning: All Name Servers from the same Country / IP location.: 4 Name Servers, 1 Countries: US
AInfo: Ipv4-Subnet-list: 3 Name Servers, 1 different subnets (first Byte): 205., 1 different subnets (first two Bytes): 205.251., 3 different subnets (first three Bytes): 205.251.194., 205.251.196., 205.251.199.
AGood: Name Server IPv4-addresses from different subnet found:
AInfo: IPv6-Subnet-list: 4 Name Servers with IPv6, 1 different subnets (first block): 2600:, 1 different subnets (first two blocks): 2600:9000:, 4 different subnets (first three blocks): 2600:9000:5301:, 2600:9000:5302:, 2600:9000:5304:, 2600:9000:5307:, 4 different subnets (first four blocks): 2600:9000:5301:2c00:, 2600:9000:5302:f700:, 2600:9000:5304:4c00:, 2600:9000:5307:8b00:
AGood: Name Server IPv6 addresses from different subnets found.
AGood: Nameserver supports TCP connections: 7 good Nameserver
AGood: Nameserver supports Echo Capitalization: 7 good Nameserver
AGood: Nameserver supports EDNS with max. 512 Byte Udp payload, message is smaller: 7 good Nameserver
XFatal error: Nameserver doesn't support EDNS with max. 512 Byte Udp payload or sends more then 512 Bytes: ns-1067.awsdns-05.org
XFatal error: Nameserver doesn't support EDNS with max. 512 Byte Udp payload or sends more then 512 Bytes: ns-1100.awsdns-09.org
XFatal error: Nameserver doesn't support EDNS with max. 512 Byte Udp payload or sends more then 512 Bytes: ns-1931.awsdns-49.co.uk
XFatal error: Nameserver doesn't support EDNS with max. 512 Byte Udp payload or sends more then 512 Bytes: ns-1964.awsdns-53.co.uk
XFatal error: Nameserver doesn't support EDNS with max. 512 Byte Udp payload or sends more then 512 Bytes: ns-300.awsdns-37.com
XFatal error: Nameserver doesn't support EDNS with max. 512 Byte Udp payload or sends more then 512 Bytes: ns-345.awsdns-43.com
XFatal error: Nameserver doesn't support EDNS with max. 512 Byte Udp payload or sends more then 512 Bytes: ns-629.awsdns-14.net
XFatal error: Nameserver doesn't support EDNS with max. 512 Byte Udp payload or sends more then 512 Bytes: ns-759.awsdns-30.net
AGood: Nameserver has passed 10 EDNS-Checks (OP100, FLAGS, V1, V1OP100, V1FLAGS, DNSSEC, V1DNSSEC, NSID, COOKIE, CLIENTSUBNET): 7 good Nameserver
Nameserver doesn't pass all EDNS-Checks: ns-1067.awsdns-05.org / 205.251.196.43: OP100: no result. FLAGS: no result. V1: ok. V1OP100: ok. V1FLAGS: ok. DNSSEC: no result. V1DNSSEC: ok. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: ns-1067.awsdns-05.org / 2600:9000:5304:2b00::1: OP100: no result. FLAGS: no result. V1: ok. V1OP100: ok. V1FLAGS: ok. DNSSEC: no result. V1DNSSEC: ok. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: ns-1100.awsdns-09.org / 205.251.196.76: OP100: no result. FLAGS: no result. V1: ok. V1OP100: ok. V1FLAGS: ok. DNSSEC: no result. V1DNSSEC: ok. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: ns-1100.awsdns-09.org / 2600:9000:5304:4c00::1: OP100: no result. FLAGS: no result. V1: ok. V1OP100: ok. V1FLAGS: ok. DNSSEC: no result. V1DNSSEC: ok. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: ns-1931.awsdns-49.co.uk / 205.251.199.139: OP100: no result. FLAGS: no result. V1: ok. V1OP100: ok. V1FLAGS: ok. DNSSEC: no result. V1DNSSEC: ok. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: ns-1931.awsdns-49.co.uk / 2600:9000:5307:8b00::1: OP100: no result. FLAGS: no result. V1: ok. V1OP100: ok. V1FLAGS: ok. DNSSEC: no result. V1DNSSEC: ok. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: ns-1964.awsdns-53.co.uk / 205.251.199.172: OP100: no result. FLAGS: no result. V1: ok. V1OP100: ok. V1FLAGS: ok. DNSSEC: no result. V1DNSSEC: ok. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: ns-300.awsdns-37.com: OP100: no result. FLAGS: no result. V1: no result. V1OP100: no result. V1FLAGS: no result. DNSSEC: no result. V1DNSSEC: no result. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: ns-300.awsdns-37.com / 205.251.193.44: OP100: no result. FLAGS: no result. V1: ok. V1OP100: ok. V1FLAGS: ok. DNSSEC: no result. V1DNSSEC: ok. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: ns-300.awsdns-37.com / 2600:9000:5301:2c00::1: OP100: no result. FLAGS: no result. V1: ok. V1OP100: ok. V1FLAGS: ok. DNSSEC: no result. V1DNSSEC: ok. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: ns-345.awsdns-43.com / 205.251.193.89: OP100: no result. FLAGS: no result. V1: ok. V1OP100: ok. V1FLAGS: ok. DNSSEC: no result. V1DNSSEC: ok. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: ns-345.awsdns-43.com / 2600:9000:5301:5900::1: OP100: no result. FLAGS: no result. V1: ok. V1OP100: ok. V1FLAGS: ok. DNSSEC: no result. V1DNSSEC: ok. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: ns-629.awsdns-14.net / 205.251.194.117: OP100: no result. FLAGS: no result. V1: ok. V1OP100: ok. V1FLAGS: ok. DNSSEC: no result. V1DNSSEC: ok. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: ns-759.awsdns-30.net / 205.251.194.247: OP100: no result. FLAGS: no result. V1: ok. V1OP100: ok. V1FLAGS: ok. DNSSEC: no result. V1DNSSEC: ok. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: ns-759.awsdns-30.net / 2600:9000:5302:f700::1: OP100: no result. FLAGS: no result. V1: ok. V1OP100: ok. V1FLAGS: ok. DNSSEC: no result. V1DNSSEC: ok. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
AGood: All SOA have the same Serial Number
Warning: No CAA entry with issue/issuewild found, every CAA can create a certificate. Read https://en.wikipedia.org/wiki/DNS_Certification_Authority_Authorization to learn some basics about the idea of CAA. Your name server must support such an entry. Not all dns providers support CAA entries.

3. Content- and Performance-critical Checks

AGood: All checks /.well-known/acme-challenge/random-filename without redirects answer with the expected http status 404 - Not Found. Creating a Letsencrypt certificate via http-01 challenge should work. If it doesn't work: Check your vHost configuration (apachectl -S, httpd -S, nginx -T). Every combination of port and ServerName / ServerAlias (Apache) or Server (Nginx) must be unique. Merge duplicated entries in one vHost. If you use an IIS, extensionless files must be allowed in the /.well-known/acme-challenge subdirectory. Create a web.config in that directory. Content: <configuration><system.webServer><staticContent><mimeMap fileExtension="." mimeType="text/plain" /></staticContent></system.webServer></configuration>. If you have a redirect http ⇒ https, that's ok, Letsencrypt follows such redirects to port 80 / 443 (same or other server). There must be a certificate. But the certificate may be expired, self signed or with a not matching domain name. Checking the validation file Letsencrypt ignores such certificate errors. Trouble creating a certificate? Use https://community.letsencrypt.org/ to ask.
AGood: Every https result with status 200 supports GZip.
https://chi-chu.tschang.net/ 52.52.105.85
200

Warning: Https + http status 200 + Inline CSS / JavaScript found. Don't use inline CSS / JavaScript. These are compiled and re-used ressources, save these with a long Cache-Control max-age - header.
https://chi-chu.tschang.net/ 54.177.68.202
200

Warning: Https + http status 200 + Inline CSS / JavaScript found. Don't use inline CSS / JavaScript. These are compiled and re-used ressources, save these with a long Cache-Control max-age - header.
https://52.52.105.85/ 52.52.105.85
200

Warning: Https + http status 200 + Inline CSS / JavaScript found. Don't use inline CSS / JavaScript. These are compiled and re-used ressources, save these with a long Cache-Control max-age - header.
https://54.177.68.202/ 54.177.68.202
200

Warning: Https + http status 200 + Inline CSS / JavaScript found. Don't use inline CSS / JavaScript. These are compiled and re-used ressources, save these with a long Cache-Control max-age - header.
https://chi-chu.tschang.net/ 52.52.105.85
200

Warning: Https result with status 200 found, Html-Content is too big. Should be max. 110 %. May contain inline CSS / JavaScript, too much comments or white space. Re-used ressources - create files with a long Cache-Control max-age header. Remove comments and white space.
https://chi-chu.tschang.net/ 54.177.68.202
200

Warning: Https result with status 200 found, Html-Content is too big. Should be max. 110 %. May contain inline CSS / JavaScript, too much comments or white space. Re-used ressources - create files with a long Cache-Control max-age header. Remove comments and white space.
https://52.52.105.85/ 52.52.105.85
200

Warning: Https result with status 200 found, Html-Content is too big. Should be max. 110 %. May contain inline CSS / JavaScript, too much comments or white space. Re-used ressources - create files with a long Cache-Control max-age header. Remove comments and white space.
https://54.177.68.202/ 54.177.68.202
200

Warning: Https result with status 200 found, Html-Content is too big. Should be max. 110 %. May contain inline CSS / JavaScript, too much comments or white space. Re-used ressources - create files with a long Cache-Control max-age header. Remove comments and white space.
https://chi-chu.tschang.net/ 52.52.105.85
200

Warning: Https connections (Standard Port 443) found without support of the http/2 protocol via ALPN. Http/2 is the new Http-Version (old: http 1.1) with some important new features. Update your server software so http/2 is available. Only one TCP-connection per Server (that's a performance boost), Header-Compression and Server Pushs are available. Domain Sharding and Inline-CSS/Javascript shouldn't used with http/2.
https://chi-chu.tschang.net/ 54.177.68.202
200

Warning: Https connections (Standard Port 443) found without support of the http/2 protocol via ALPN. Http/2 is the new Http-Version (old: http 1.1) with some important new features. Update your server software so http/2 is available. Only one TCP-connection per Server (that's a performance boost), Header-Compression and Server Pushs are available. Domain Sharding and Inline-CSS/Javascript shouldn't used with http/2.
https://52.52.105.85/ 52.52.105.85
200

Warning: Https connections (Standard Port 443) found without support of the http/2 protocol via ALPN. Http/2 is the new Http-Version (old: http 1.1) with some important new features. Update your server software so http/2 is available. Only one TCP-connection per Server (that's a performance boost), Header-Compression and Server Pushs are available. Domain Sharding and Inline-CSS/Javascript shouldn't used with http/2.
https://54.177.68.202/ 54.177.68.202
200

Warning: Https connections (Standard Port 443) found without support of the http/2 protocol via ALPN. Http/2 is the new Http-Version (old: http 1.1) with some important new features. Update your server software so http/2 is available. Only one TCP-connection per Server (that's a performance boost), Header-Compression and Server Pushs are available. Domain Sharding and Inline-CSS/Javascript shouldn't used with http/2.
https://chi-chu.tschang.net/ 52.52.105.85
200

Critical: Some script Elements (type text/javascript) with a src-Attribute don't have a defer / async - Attribute. Loading and executing these JavaScripts blocks parsing and rendering the Html-Output. That's bad if your site is large or the connection is slow / mobile usage. Use "async" if the js file has only functions (so nothing is executed after parsing the file) or is independend. Use "defer" if the order of the scripts is important. All "defer" scripts are executed before the DOMContentLoaded event is fired. Check https://developer.mozilla.org/en-US/docs/Web/HTML/Element/script to see some details.: 3 script elements without defer/async.
https://chi-chu.tschang.net/ 54.177.68.202
200

Critical: Some script Elements (type text/javascript) with a src-Attribute don't have a defer / async - Attribute. Loading and executing these JavaScripts blocks parsing and rendering the Html-Output. That's bad if your site is large or the connection is slow / mobile usage. Use "async" if the js file has only functions (so nothing is executed after parsing the file) or is independend. Use "defer" if the order of the scripts is important. All "defer" scripts are executed before the DOMContentLoaded event is fired. Check https://developer.mozilla.org/en-US/docs/Web/HTML/Element/script to see some details.: 3 script elements without defer/async.
https://chi-chu.tschang.net/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
404

Critical: Some script Elements (type text/javascript) with a src-Attribute don't have a defer / async - Attribute. Loading and executing these JavaScripts blocks parsing and rendering the Html-Output. That's bad if your site is large or the connection is slow / mobile usage. Use "async" if the js file has only functions (so nothing is executed after parsing the file) or is independend. Use "defer" if the order of the scripts is important. All "defer" scripts are executed before the DOMContentLoaded event is fired. Check https://developer.mozilla.org/en-US/docs/Web/HTML/Element/script to see some details.: 3 script elements without defer/async.
https://52.52.105.85/ 52.52.105.85
200

Critical: Some script Elements (type text/javascript) with a src-Attribute don't have a defer / async - Attribute. Loading and executing these JavaScripts blocks parsing and rendering the Html-Output. That's bad if your site is large or the connection is slow / mobile usage. Use "async" if the js file has only functions (so nothing is executed after parsing the file) or is independend. Use "defer" if the order of the scripts is important. All "defer" scripts are executed before the DOMContentLoaded event is fired. Check https://developer.mozilla.org/en-US/docs/Web/HTML/Element/script to see some details.: 3 script elements without defer/async.
https://54.177.68.202/ 54.177.68.202
200

Critical: Some script Elements (type text/javascript) with a src-Attribute don't have a defer / async - Attribute. Loading and executing these JavaScripts blocks parsing and rendering the Html-Output. That's bad if your site is large or the connection is slow / mobile usage. Use "async" if the js file has only functions (so nothing is executed after parsing the file) or is independend. Use "defer" if the order of the scripts is important. All "defer" scripts are executed before the DOMContentLoaded event is fired. Check https://developer.mozilla.org/en-US/docs/Web/HTML/Element/script to see some details.: 3 script elements without defer/async.
AGood: All CSS / JavaScript files are sent with GZip. That reduces the content of the files. 30 external CSS / JavaScript files found
AGood: All images with internal compression not sent via GZip. Images (.png, .jpg) are already compressed, so an additional GZip isn't helpful. 5 images (type image/png, image/jpg) found without additional GZip. Not required because these images are already compressed
Warning: CSS / JavaScript files with a missing or too short Cache-Control header found. Browsers should cache and re-use these files. 11 external CSS / JavaScript files without Cache-Control-Header, 0 with Cache-Control, but no max-age, 4 with Cache-Control max-age too short (minimum 7 days), 15 with Cache-Control long enough, 30 complete.
Warning: Images with a missing or too short Cache-Control header found. Browsers should cache and re-use these files. 0 image files without Cache-Control-Header, 0 with Cache-Control, but no max-age, 10 with Cache-Control max-age too short (minimum 7 days), 0 with Cache-Control long enough, 10 complete.
AGood: All checked attribute values are enclosed in quotation marks (" or ').
Wrong: img-elements without alt-attribute or empty alt-attribute found. The alt-attribute ("alternative") is required and should describe the img. So Screenreader and search engines are able to use these informations.: 10 img-elements without alt-attribute, 0 img-elements with empty alt-attribute found.
AGood: Domainname is not on the "Specially Designated Nationals And Blocked Persons List" (SDN). That's an US-list of individuals and companies owned or controlled by, or acting for or on behalf of, targeted countries. It also lists individuals, groups, and entities, such as terrorists and narcotics traffickers designated under programs that are not country-specific. Collectively, such individuals and companies are called "Specially Designated Nationals" or "SDNs." Their assets are blocked and U.S. persons are generally prohibited from dealing with them. So if a domain name is on that list, it's impossible to create a Letsencrypt certificate with that domain name. Check the list manual - https://www.treasury.gov/resource-center/sanctions/sdn-list/pages/default.aspx
https://chi-chu.tschang.net/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
404
4.787 seconds
Warning: 404 needs more then one second
ADuration: 234357 milliseconds, 234.357 seconds


8. Connections

DomainIPPortCert.ProtocolKeyExchangeStrengthCipherStrengthHashAlgorithmOCSP stapling
Domain/KeyExchangeIP/StrengthPort/CipherCert./StrengthProtocol/HashAlgorithmOCSP stapling
chi-chu.tschang.net
52.52.105.85
443
ok
Tls12
ECDH Ephermal
256
Aes128
128
Sha256
error checking OCSP stapling
ok
chi-chu.tschang.net
52.52.105.85
443
ok
Tls12

ECDH Ephermal
256
Aes128
128
Sha256
error checking OCSP stapling
ok
no http/2 via ALPN 
No SNI required - domain included in main certificate
Tls.1.2
Tls.1.1
Tls.1.0
no http/2 via ALPN
No SNI required - domain included in main certificate
Tls.1.2
Tls.1.1
Tls.1.0
Chain - too much certificates, don't send root certificates
1CN=chi-chu.tschang.net

2CN=Amazon, OU=Server CA 1B, O=Amazon, C=US

3CN=Amazon Root CA 1, O=Amazon, C=US

4CN=Starfield Services Root Certificate Authority - G2, O="Starfield Technologies, Inc.", L=Scottsdale, C=US, ST=Arizona


chi-chu.tschang.net
54.177.68.202
443
ok
Tls12
ECDH Ephermal
256
Aes128
128
Sha256
error checking OCSP stapling
ok

chi-chu.tschang.net
54.177.68.202
443
ok
Tls12

ECDH Ephermal
256
Aes128
128
Sha256
error checking OCSP stapling
ok
no http/2 via ALPN 
No SNI required - domain included in main certificate
Tls.1.2
Tls.1.1
Tls.1.0
no http/2 via ALPN
No SNI required - domain included in main certificate
Tls.1.2
Tls.1.1
Tls.1.0
Chain - too much certificates, don't send root certificates
1CN=chi-chu.tschang.net

2CN=Amazon, OU=Server CA 1B, O=Amazon, C=US

3CN=Amazon Root CA 1, O=Amazon, C=US

4CN=Starfield Services Root Certificate Authority - G2, O="Starfield Technologies, Inc.", L=Scottsdale, C=US, ST=Arizona


chi-chu.tschang.net
chi-chu.tschang.net
443
ok
Tls12
ECDH Ephermal
256
Aes128
128
Sha256
error checking OCSP stapling
ok

chi-chu.tschang.net
chi-chu.tschang.net
443
ok
Tls12

ECDH Ephermal
256
Aes128
128
Sha256
error checking OCSP stapling
ok
no http/2 via ALPN 
Tls.1.2
Tls.1.1
Tls.1.0
no http/2 via ALPN
Tls.1.2
Tls.1.1
Tls.1.0
Chain - too much certificates, don't send root certificates
1CN=chi-chu.tschang.net

2CN=Amazon, OU=Server CA 1B, O=Amazon, C=US

3CN=Amazon Root CA 1, O=Amazon, C=US

4CN=Starfield Services Root Certificate Authority - G2, O="Starfield Technologies, Inc.", L=Scottsdale, C=US, ST=Arizona


52.52.105.85
52.52.105.85
443
name does not match
Tls12
ECDH Ephermal
256
Aes128
128
Sha256
error checking OCSP stapling
ok

52.52.105.85
52.52.105.85
443
name does not match
Tls12

ECDH Ephermal
256
Aes128
128
Sha256
error checking OCSP stapling
ok
no http/2 via ALPN 
Cert sent without SNI
Tls.1.2
Tls.1.1
Tls.1.0
no http/2 via ALPN
Cert sent without SNI
Tls.1.2
Tls.1.1
Tls.1.0
Chain - too much certificates, don't send root certificates
1CN=chi-chu.tschang.net

2CN=Amazon, OU=Server CA 1B, O=Amazon, C=US

3CN=Amazon Root CA 1, O=Amazon, C=US

4CN=Starfield Services Root Certificate Authority - G2, O="Starfield Technologies, Inc.", L=Scottsdale, C=US, ST=Arizona


54.177.68.202
54.177.68.202
443
name does not match
Tls12
ECDH Ephermal
256
Aes128
128
Sha256
error checking OCSP stapling
ok

54.177.68.202
54.177.68.202
443
name does not match
Tls12

ECDH Ephermal
256
Aes128
128
Sha256
error checking OCSP stapling
ok
no http/2 via ALPN 
Cert sent without SNI
Tls.1.2
Tls.1.1
Tls.1.0
no http/2 via ALPN
Cert sent without SNI
Tls.1.2
Tls.1.1
Tls.1.0
Chain - too much certificates, don't send root certificates
1CN=chi-chu.tschang.net

2CN=Amazon, OU=Server CA 1B, O=Amazon, C=US

3CN=Amazon Root CA 1, O=Amazon, C=US

4CN=Starfield Services Root Certificate Authority - G2, O="Starfield Technologies, Inc.", L=Scottsdale, C=US, ST=Arizona


9. Certificates

1.
1.
CN=chi-chu.tschang.net
20.01.2020
20.02.2021
expires in 192 days
chi-chu.tschang.net, tschang.net, www.tschang.net - 3 entries
1.
1.
CN=chi-chu.tschang.net
20.01.2020

20.02.2021
expires in 192 days
chi-chu.tschang.net, tschang.net, www.tschang.net - 3 entries

KeyalgorithmRSA encryption (2048 bit)
Signatur:SHA256 With RSA-Encryption
Serial Number:0941A8A0A81E17A2C687F1740298FB1E
Thumbprint:D5B4192C0600705B325F61DD0450CEFD4BBC74DA
SHA256 / Certificate:eMCkVljSsM7p/bsm3PQiKMqd5iqfgMoVhCVpQfr46lI=
SHA256 hex / Cert (DANE * 0 1):e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA256 hex / PublicKey (DANE * 1 1):9dc2b24828c41cd02ba0254e3a07ba9b00496ef01ef4ec4f0c0ff4631bfc0901
SHA256 hex / Subject Public Key Information (SPKI):d384b58c7db144f29dee2cf7452be81abbf8e78a12a33ca4ceb5c5ce7a45e0fc
SPKI checked via https://v1.pwnedkeys.com/spki-hash:Good: Key isn't compromised
OCSP - Url:http://ocsp.sca1b.amazontrust.com
OCSP - must staple:no
Certificate Transparency:yes
Enhanced Key Usage:Serverauthentifizierung (1.3.6.1.5.5.7.3.1), Clientauthentifizierung (1.3.6.1.5.5.7.3.2)


2.
CN=Amazon, OU=Server CA 1B, O=Amazon, C=US
22.10.2015
19.10.2025
expires in 1894 days


2.
CN=Amazon, OU=Server CA 1B, O=Amazon, C=US
22.10.2015

19.10.2025
expires in 1894 days


KeyalgorithmRSA encryption (2048 bit)
Signatur:SHA256 With RSA-Encryption
Serial Number:067F94578587E8AC77DEB253325BBC998B560D
Thumbprint:917E732D330F9A12404F73D8BEA36948B929DFFC
SHA256 / Certificate:9V+f/Lg8c0UyYWAcfgRNsVoPA0uTwFgw8oY174ic9nA=
SHA256 hex / Cert (DANE * 0 1):f55f9ffcb83c73453261601c7e044db15a0f034b93c05830f28635ef889cf670
SHA256 hex / PublicKey (DANE * 1 1):252333a8e3abb72393d6499abbacca8604faefa84681ccc3e5531d44cc896450
SHA256 hex / Subject Public Key Information (SPKI):034329e702fb0865d7a01bd4602018e922e0717ee7f851a202d7b75305c9b6fc
SPKI checked via https://v1.pwnedkeys.com/spki-hash:Good: Key isn't compromised
OCSP - Url:http://ocsp.rootca1.amazontrust.com
OCSP - must staple:no
Certificate Transparency:no
Enhanced Key Usage:


3.
CN=Amazon Root CA 1, O=Amazon, C=US
25.05.2015
31.12.2037
expires in 6350 days


3.
CN=Amazon Root CA 1, O=Amazon, C=US
25.05.2015

31.12.2037
expires in 6350 days


KeyalgorithmRSA encryption (2048 bit)
Signatur:SHA256 With RSA-Encryption
Serial Number:067F944A2A27CDF3FAC2AE2B01F908EEB9C4C6
Thumbprint:06B25927C42A721631C1EFD9431E648FA62E1E39
SHA256 / Certificate:h9zU3HRkCjIs0gVVJQbRvmTxJZYlgJZUSYa0hQvHJwY=
SHA256 hex / Cert (DANE * 0 1):87dcd4dc74640a322cd205552506d1be64f12596258096544986b4850bc72706
SHA256 hex / PublicKey (DANE * 1 1):fbe3018031f9586bcbf41727e417b7d1c45c2f47f93be372a17b96b50757d5a2
SHA256 hex / Subject Public Key Information (SPKI):a0d3611a57ec229b0948156c5ba03cc75201228724fa3199dff6e0391db44126
SPKI checked via https://v1.pwnedkeys.com/spki-hash:Good: Key isn't compromised
OCSP - Url:http://ocsp.rootg2.amazontrust.com
OCSP - must staple:no
Certificate Transparency:no
Enhanced Key Usage:


4.
CN=Starfield Services Root Certificate Authority - G2, O="Starfield Technologies, Inc.", L=Scottsdale, S=Arizona, C=US
02.09.2009
28.06.2034
expires in 5068 days


4.
CN=Starfield Services Root Certificate Authority - G2, O="Starfield Technologies, Inc.", L=Scottsdale, S=Arizona, C=US
02.09.2009

28.06.2034
expires in 5068 days


KeyalgorithmRSA encryption (2048 bit)
Signatur:SHA256 With RSA-Encryption
Serial Number:00A70E4A4C3482B77F
Thumbprint:9E99A48A9960B14926BB7F3B02E22DA2B0AB7280
SHA256 / Certificate:KGibMOTDBqq1OwJ7KeNq1t0dz0uVOZRILKhL3B7KyZY=
SHA256 hex / Cert (DANE * 0 1):28689b30e4c306aab53b027b29e36ad6dd1dcf4b953994482ca84bdc1ecac996
SHA256 hex / PublicKey (DANE * 1 1):2b071c59a0a0ae76b0eadb2bad23bad4580b69c3601b630c2eaf0613afa83f92
SHA256 hex / Subject Public Key Information (SPKI):8b07e69961902343b660b2828006c7fbb29e3957bceab1eb5e7dcf226c78ce52
SPKI checked via https://v1.pwnedkeys.com/spki-hash:Good: Key isn't compromised
OCSP - Url:http://o.ss2.us/
OCSP - must staple:no
Certificate Transparency:no
Enhanced Key Usage:


10. Last Certificates - Certificate Transparency Log Check

1. Source CertSpotter - active certificates (one check per day)

Issuerlast 7 daysactivenum Certs
CN=Amazon, OU=Server CA 1B, O=Amazon, C=US
0
3
4

CertSpotter-IdIssuernot beforenot afterDomain namesLE-Duplicatenext LE
1374505181
leaf cert
CN=Amazon, OU=Server CA 1B, O=Amazon, C=US
2020-01-20 00:00:00
2021-02-20 12:00:00
chi-chu.tschang.net, tschang.net, www.tschang.net - 3 entries


1021754191
precert
CN=Amazon, OU=Server CA 1B, O=Amazon, C=US
2019-07-17 00:00:00
2020-08-17 12:00:00
chi-chu.tschang.net, tschang.net, www.tschang.net - 3 entries


1019980673
leaf cert
CN=Amazon, OU=Server CA 1B, O=Amazon, C=US
2019-07-16 00:00:00
2020-08-16 12:00:00
chi-chu.tschang.net, tschang.net, www.tschang.net - 3 entries


771499405
leaf cert
CN=Amazon, OU=Server CA 1B, O=Amazon, C=US
2019-02-19 00:00:00
2020-03-19 12:00:00
chi-chu.tschang.net, tschang.net, www.tschang.net - 3 entries



2. Source crt.sh - old and new certificates, sometimes very slow - only certificates with "not after" > 2019 are listed

Issuerlast 7 daysactivenum Certs
CN=Amazon, OU=Server CA 1B, O=Amazon, C=US
0
3
4

CRT-IdIssuernot beforenot afterDomain namesLE-Duplicatenext LE
2360037432
leaf cert
CN=Amazon, OU=Server CA 1B, O=Amazon, C=US
2020-01-19 23:00:00
2021-02-20 11:00:00
chi-chu.tschang.net, tschang.net, www.tschang.net
3 entries


1676348210
precert
CN=Amazon, OU=Server CA 1B, O=Amazon, C=US
2019-07-16 22:00:00
2020-08-17 10:00:00
chi-chu.tschang.net, tschang.net, www.tschang.net
3 entries


1693379125
leaf cert
CN=Amazon, OU=Server CA 1B, O=Amazon, C=US
2019-07-15 22:00:00
2020-08-16 10:00:00
chi-chu.tschang.net, tschang.net, www.tschang.net
3 entries


1231697410
leaf cert
CN=Amazon, OU=Server CA 1B, O=Amazon, C=US
2019-02-18 23:00:00
2020-03-19 11:00:00
chi-chu.tschang.net, tschang.net, www.tschang.net
3 entries



11. Html-Content - Entries

Summary

Subresource Integrity (SRI)
DomainnameHtmlElementrel/property∑ size∑ problems∑ int.∑ ext.∑ Origin poss.∑ SRI ParseErrors∑ SRI valid∑ SRI missing
https://chi-chu.tschang.net/
52.52.105.85
a

20

0


0
0
0


img

2
369,923 Bytes
0
2
0
0
0
0


link
stylesheet
3
40,314 Bytes
0
1
2
2
0
2
0

link
other
2
23,462 Bytes
0
1
0
0
0
0


meta
other
4

0


0
0
0


script

3
47,001 Bytes
0
0
3
3
0
3
0
https://chi-chu.tschang.net/
54.177.68.202
a

20

0


0
0
0


img

2
369,923 Bytes
0
2
0
0
0
0


link
stylesheet
3
40,314 Bytes
0
1
2
2
0
2
0

link
other
2
23,462 Bytes
0
1
0
0
0
0


meta
other
4

0


0
0
0


script

3
47,001 Bytes
0
0
3
3
0
3
0
https://chi-chu.tschang.net/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
a

12

0


0
0
0


img

2
369,923 Bytes
0
2
0
0
0
0


link
stylesheet
3
41,161 Bytes
1
1
2
2
0
2
0

link
other
2
23,462 Bytes
0
1
0
0
0
0


meta
other
4

0


0
0
0


script

3
47,001 Bytes
0
0
3
3
0
3
0
https://52.52.105.85/
52.52.105.85
a

20

0


0
0
0


img

2
369,923 Bytes
0
2
0
0
0
0


link
stylesheet
3
40,314 Bytes
0
1
2
2
0
2
0

link
other
2
23,462 Bytes
0
1
0
0
0
0


meta
other
4

0


0
0
0


script

3
47,001 Bytes
0
0
3
3
0
3
0
https://54.177.68.202/
54.177.68.202
a

20

0


0
0
0


img

2
369,923 Bytes
0
2
0
0
0
0


link
stylesheet
3
40,314 Bytes
0
1
2
2
0
2
0

link
other
2
23,462 Bytes
0
1
0
0
0
0


meta
other
4

0


0
0
0


script

3
47,001 Bytes
0
0
3
3
0
3
0

Details

DomainnameHtml-Elementname/equiv/ property/relhref/src/contentHttpStatusmsgStatus
https://chi-chu.tschang.net/
52.52.105.85
a

/


3
ok








a

/learning


1
ok








a

/projects


1
ok








a

/reading


1
ok








a

/resume


1
ok








a

https://ahs.ausdk12.org/


1
ok








a

https://fresnostate.edu/kremen/


1
ok








a

https://pgp.mit.edu/pks/lookup?op=get&search=0x152A5675369F6C28


1
ok








a

https://twitter.com/tschang


1
ok








a

https://www.businessweek.com/stories/2008-02-11/a-french-water-companys-cautionary-tale-in-chinabusinessweek-business-news-stock-market-and-financial-advice


1
ok








a

https://www.businessweek.com/stories/2008-04-09/the-new-e-spionage-threat


1
ok








a

https://www.businessweek.com/stories/2008-08-15/empty-seats-at-chinas-sellout-olympicsbusinessweek-business-news-stock-market-and-financial-advice


1
ok








a

https://www.businessweek.com/stories/2008-10-01/dangerous-fakes


1
ok








a

https://www.businessweek.com/stories/2008-12-30/the-squeeze-at-chinas-baidu


1
ok








a

https://www.github.com/chichutschang/


1
ok








a

https://www.goodreads.com/book/show/33313.Kitchen_Confidential


1
ok








a

https://www.goodreads.com/review/list/1589736/


1
ok








a

mailto:chi-chu@tschang.net


1
ok








img
src
/images/chi-chu.tschang.png
200

1
ok
no alt-Attributeimage/png, missing X-Content-Type-Options nosniff

Cache-Control: public, max-age=0 - max-age too short.
No GZip - 277542 Bytes






img
src
/images/chichutschanglogo.jpg
200

1
ok
no alt-Attributeimage/jpeg, missing X-Content-Type-Options nosniff

Cache-Control: public, max-age=0 - max-age too short.
No GZip - 92381 Bytes






link
icon
/images/tschang.ico
200

1
ok
image/x-icon, missing X-Content-Type-Options nosniff

Cache-Control: public, max-age=0 - max-age too short.
No GZip - 23462 Bytes






link
shortcut icon
data:;base64,iVBORw0KGgo=


1
ok








link
stylesheet
../stylesheets/style.css
200

1
ok
text/css; charset=UTF-8, missing X-Content-Type-Options nosniff

Cache-Control: public, max-age=0 - max-age too short.
GZip: 865/4297 Bytes




local SRI possible, possible hash-values:

sha256-pSgtGZJBLuZlOy3kRblEX8aPSBFeibdY5yr+FlaYf0A=
sha384-dHwlPqR++yXRNYB1CUEJhDyUAqIFruStVRtw+LYYHANAQ+lMgba68Dpesx+C9htF
sha512-4bxLcrbCx9vzvyioEz0mocS1v7SSBhkNCezQvzCnD+QOYg1YvBzFOFu8SUNWSaIh5GhgsFM3GYzCyxPpFjRkuQ==

<link rel="stylesheet" href="../stylesheets/style.css" crossorigin="anonymous" integrity="sha256-pSgtGZJBLuZlOy3kRblEX8aPSBFeibdY5yr+FlaYf0A=" />



Content loaded via url("...")

/stylesheets/Gotham-Book.otf1
styles.css1

link
stylesheet
https://pro.fontawesome.com/releases/v5.6.3/css/all.css
200

1
ok
text/css, missing X-Content-Type-Options nosniff

Cache-Control: max-age=31556926 - with long duration found.
GZip: 15608/76169 Bytes




Server-Header Access-Control-Allow-Origin: *
Cross-Origin Resource Sharing (CORS) supported

integrity: sha384-LRlmVvLKVApDVGuspQFnRQJjkv0P7/YFrw84YYQtmYG4nK8c+M+NlmYDCv0rKWpG
crossorigin: anonymous
No SRI Parse errorvalid


Content loaded via url("...")

../webfonts/fa-brands-400.eot1
../webfonts/fa-brands-400.eot?#iefix1
../webfonts/fa-brands-400.svg#fontawesome1
../webfonts/fa-brands-400.ttf1
../webfonts/fa-brands-400.woff1
../webfonts/fa-brands-400.woff21
../webfonts/fa-light-300.eot1
../webfonts/fa-light-300.eot?#iefix1
../webfonts/fa-light-300.svg#fontawesome1
../webfonts/fa-light-300.ttf1
../webfonts/fa-light-300.woff1
../webfonts/fa-light-300.woff21
../webfonts/fa-regular-400.eot1
../webfonts/fa-regular-400.eot?#iefix1
../webfonts/fa-regular-400.svg#fontawesome1
../webfonts/fa-regular-400.ttf1
../webfonts/fa-regular-400.woff1
../webfonts/fa-regular-400.woff21
../webfonts/fa-solid-900.eot1
../webfonts/fa-solid-900.eot?#iefix1
../webfonts/fa-solid-900.svg#fontawesome1
../webfonts/fa-solid-900.ttf1
../webfonts/fa-solid-900.woff1
../webfonts/fa-solid-900.woff21

link
stylesheet
https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css
200

1
ok
text/css; charset=utf-8, X-Content-Type-Options nosniff found

No Cache-Control - header
GZip: 23841/160403 Bytes




Server-Header Access-Control-Allow-Origin: *
Cross-Origin Resource Sharing (CORS) supported

integrity: sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk
crossorigin: anonymous
No SRI Parse errorvalid


Content loaded via url("...")

data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='%23fff' width='8' height='8' viewBox='0 0 8 8'%3e%3cpath d='M2.75 0l-1.5 1.5L3.75 4l-2.5 2.5L2.75 8l4-4-4-4z'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='%23fff' width='8' height='8' viewBox='0 0 8 8'%3e%3cpath d='M5.25 0l-4 4 4 4 1.5-1.5L4.25 4l2.5-2.5L5.25 0z'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%23dc3545' viewBox='0 0 12 12'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23dc3545' stroke='none'/%3e%3c/svg%3e2
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='-4 -4 8 8'%3e%3ccircle r='3' fill='%23fff'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%280, 0, 0, 0.5%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.5%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='4' height='4' viewBox='0 0 4 4'%3e%3cpath stroke='%23fff' d='M0 2h4'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='4' height='5' viewBox='0 0 4 5'%3e%3cpath fill='%23343a40' d='M2 0L0 2h4zm0 5L0 3h4z'/%3e%3c/svg%3e3
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8' viewBox='0 0 8 8'%3e%3cpath fill='%2328a745' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e2
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8' viewBox='0 0 8 8'%3e%3cpath fill='%23fff' d='M6.564.75l-3.59 3.612-1.538-1.55L0 4.26l2.974 2.99L8 2.193z'/%3e%3c/svg%3e1

meta
content-type
text/html; charset=utf-8


1
ok








meta
author
Chi-Chu Tschang


1
ok








meta
description
chi-chu.tschang.net is the personal website of Chi-Chu Tschang


1
ok








meta
viewport
width=device-width, initial-scale=1.0, user-scalable=no


1
ok








script
src
https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js
200

1
ok
Missing defer / async attribute. application/javascript; charset=utf-8, X-Content-Type-Options nosniff found

Cache-Control: public, max-age=31536000, s-maxage=31536000, immutable - with long duration found.
GZip: 7510/21257 Bytes




Server-Header Access-Control-Allow-Origin: *
Cross-Origin Resource Sharing (CORS) supported

integrity: sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo
crossorigin: anonymous
No SRI Parse errorvalid



script
src
https://code.jquery.com/jquery-3.5.1.slim.min.js
200

1
ok
Missing defer / async attribute. application/javascript; charset=utf-8, missing X-Content-Type-Options nosniff

Cache-Control: max-age=315360000,public - with long duration found.
GZip: 24606/72380 Bytes




Server-Header Access-Control-Allow-Origin: *
Cross-Origin Resource Sharing (CORS) supported

integrity: sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj
crossorigin: anonymous
No SRI Parse errorvalid



script
src
https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js
200

1
ok
Missing defer / async attribute. text/javascript; charset=utf-8, X-Content-Type-Options nosniff found

No Cache-Control - header
GZip: 14885/60174 Bytes




Server-Header Access-Control-Allow-Origin: *
Cross-Origin Resource Sharing (CORS) supported

integrity: sha384-OgVRvuATP1z7JjHLkuOU7Xw704+h835Lr+6QL9UvYjZE3Ipu6Tp75j7Bh/kR0JKI
crossorigin: anonymous
No SRI Parse errorvalid


54.177.68.202
a

/


3
ok








a

/learning


1
ok








a

/projects


1
ok








a

/reading


1
ok








a

/resume


1
ok








a

https://ahs.ausdk12.org/


1
ok








a

https://fresnostate.edu/kremen/


1
ok








a

https://pgp.mit.edu/pks/lookup?op=get&search=0x152A5675369F6C28


1
ok








a

https://twitter.com/tschang


1
ok








a

https://www.businessweek.com/stories/2008-02-11/a-french-water-companys-cautionary-tale-in-chinabusinessweek-business-news-stock-market-and-financial-advice


1
ok








a

https://www.businessweek.com/stories/2008-04-09/the-new-e-spionage-threat


1
ok








a

https://www.businessweek.com/stories/2008-08-15/empty-seats-at-chinas-sellout-olympicsbusinessweek-business-news-stock-market-and-financial-advice


1
ok








a

https://www.businessweek.com/stories/2008-10-01/dangerous-fakes


1
ok








a

https://www.businessweek.com/stories/2008-12-30/the-squeeze-at-chinas-baidu


1
ok








a

https://www.github.com/chichutschang/


1
ok








a

https://www.goodreads.com/book/show/33313.Kitchen_Confidential


1
ok








a

https://www.goodreads.com/review/list/1589736/


1
ok








a

mailto:chi-chu@tschang.net


1
ok








img
src
/images/chi-chu.tschang.png
200

1
ok
no alt-Attributeimage/png, missing X-Content-Type-Options nosniff

Cache-Control: public, max-age=0 - max-age too short.
No GZip - 277542 Bytes






img
src
/images/chichutschanglogo.jpg
200

1
ok
no alt-Attributeimage/jpeg, missing X-Content-Type-Options nosniff

Cache-Control: public, max-age=0 - max-age too short.
No GZip - 92381 Bytes






link
icon
/images/tschang.ico
200

1
ok
image/x-icon, missing X-Content-Type-Options nosniff

Cache-Control: public, max-age=0 - max-age too short.
No GZip - 23462 Bytes






link
shortcut icon
data:;base64,iVBORw0KGgo=


1
ok








link
stylesheet
../stylesheets/style.css
200

1
ok
text/css; charset=UTF-8, missing X-Content-Type-Options nosniff

Cache-Control: public, max-age=0 - max-age too short.
GZip: 865/4297 Bytes




local SRI possible, possible hash-values:

sha256-pSgtGZJBLuZlOy3kRblEX8aPSBFeibdY5yr+FlaYf0A=
sha384-dHwlPqR++yXRNYB1CUEJhDyUAqIFruStVRtw+LYYHANAQ+lMgba68Dpesx+C9htF
sha512-4bxLcrbCx9vzvyioEz0mocS1v7SSBhkNCezQvzCnD+QOYg1YvBzFOFu8SUNWSaIh5GhgsFM3GYzCyxPpFjRkuQ==

<link rel="stylesheet" href="../stylesheets/style.css" crossorigin="anonymous" integrity="sha256-pSgtGZJBLuZlOy3kRblEX8aPSBFeibdY5yr+FlaYf0A=" />



Content loaded via url("...")

/stylesheets/Gotham-Book.otf1
styles.css1

link
stylesheet
https://pro.fontawesome.com/releases/v5.6.3/css/all.css
200

1
ok
text/css, missing X-Content-Type-Options nosniff

Cache-Control: max-age=31556926 - with long duration found.
GZip: 15608/76169 Bytes




Server-Header Access-Control-Allow-Origin: *
Cross-Origin Resource Sharing (CORS) supported

integrity: sha384-LRlmVvLKVApDVGuspQFnRQJjkv0P7/YFrw84YYQtmYG4nK8c+M+NlmYDCv0rKWpG
crossorigin: anonymous
No SRI Parse errorvalid


Content loaded via url("...")

../webfonts/fa-brands-400.eot1
../webfonts/fa-brands-400.eot?#iefix1
../webfonts/fa-brands-400.svg#fontawesome1
../webfonts/fa-brands-400.ttf1
../webfonts/fa-brands-400.woff1
../webfonts/fa-brands-400.woff21
../webfonts/fa-light-300.eot1
../webfonts/fa-light-300.eot?#iefix1
../webfonts/fa-light-300.svg#fontawesome1
../webfonts/fa-light-300.ttf1
../webfonts/fa-light-300.woff1
../webfonts/fa-light-300.woff21
../webfonts/fa-regular-400.eot1
../webfonts/fa-regular-400.eot?#iefix1
../webfonts/fa-regular-400.svg#fontawesome1
../webfonts/fa-regular-400.ttf1
../webfonts/fa-regular-400.woff1
../webfonts/fa-regular-400.woff21
../webfonts/fa-solid-900.eot1
../webfonts/fa-solid-900.eot?#iefix1
../webfonts/fa-solid-900.svg#fontawesome1
../webfonts/fa-solid-900.ttf1
../webfonts/fa-solid-900.woff1
../webfonts/fa-solid-900.woff21

link
stylesheet
https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css
200

1
ok
text/css; charset=utf-8, X-Content-Type-Options nosniff found

No Cache-Control - header
GZip: 23841/160403 Bytes




Server-Header Access-Control-Allow-Origin: *
Cross-Origin Resource Sharing (CORS) supported

integrity: sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk
crossorigin: anonymous
No SRI Parse errorvalid


Content loaded via url("...")

data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='%23fff' width='8' height='8' viewBox='0 0 8 8'%3e%3cpath d='M2.75 0l-1.5 1.5L3.75 4l-2.5 2.5L2.75 8l4-4-4-4z'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='%23fff' width='8' height='8' viewBox='0 0 8 8'%3e%3cpath d='M5.25 0l-4 4 4 4 1.5-1.5L4.25 4l2.5-2.5L5.25 0z'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%23dc3545' viewBox='0 0 12 12'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23dc3545' stroke='none'/%3e%3c/svg%3e2
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='-4 -4 8 8'%3e%3ccircle r='3' fill='%23fff'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%280, 0, 0, 0.5%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.5%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='4' height='4' viewBox='0 0 4 4'%3e%3cpath stroke='%23fff' d='M0 2h4'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='4' height='5' viewBox='0 0 4 5'%3e%3cpath fill='%23343a40' d='M2 0L0 2h4zm0 5L0 3h4z'/%3e%3c/svg%3e3
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8' viewBox='0 0 8 8'%3e%3cpath fill='%2328a745' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e2
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8' viewBox='0 0 8 8'%3e%3cpath fill='%23fff' d='M6.564.75l-3.59 3.612-1.538-1.55L0 4.26l2.974 2.99L8 2.193z'/%3e%3c/svg%3e1

meta
content-type
text/html; charset=utf-8


1
ok








meta
author
Chi-Chu Tschang


1
ok








meta
description
chi-chu.tschang.net is the personal website of Chi-Chu Tschang


1
ok








meta
viewport
width=device-width, initial-scale=1.0, user-scalable=no


1
ok








script
src
https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js
200

1
ok
Missing defer / async attribute. application/javascript; charset=utf-8, X-Content-Type-Options nosniff found

Cache-Control: public, max-age=31536000, s-maxage=31536000, immutable - with long duration found.
GZip: 7510/21257 Bytes




Server-Header Access-Control-Allow-Origin: *
Cross-Origin Resource Sharing (CORS) supported

integrity: sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo
crossorigin: anonymous
No SRI Parse errorvalid



script
src
https://code.jquery.com/jquery-3.5.1.slim.min.js
200

1
ok
Missing defer / async attribute. application/javascript; charset=utf-8, missing X-Content-Type-Options nosniff

Cache-Control: max-age=315360000,public - with long duration found.
GZip: 24606/72380 Bytes




Server-Header Access-Control-Allow-Origin: *
Cross-Origin Resource Sharing (CORS) supported

integrity: sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj
crossorigin: anonymous
No SRI Parse errorvalid



script
src
https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js
200

1
ok
Missing defer / async attribute. text/javascript; charset=utf-8, X-Content-Type-Options nosniff found

No Cache-Control - header
GZip: 14885/60174 Bytes




Server-Header Access-Control-Allow-Origin: *
Cross-Origin Resource Sharing (CORS) supported

integrity: sha384-OgVRvuATP1z7JjHLkuOU7Xw704+h835Lr+6QL9UvYjZE3Ipu6Tp75j7Bh/kR0JKI
crossorigin: anonymous
No SRI Parse errorvalid


https://chi-chu.tschang.net/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de

a

/


3
ok








a

/learning


1
ok








a

/projects


1
ok








a

/reading


1
ok








a

/resume


1
ok








a

https://pgp.mit.edu/pks/lookup?op=get&search=0x152A5675369F6C28


1
ok








a

https://twitter.com/tschang


1
ok








a

https://www.github.com/chichutschang/


1
ok








a

https://www.goodreads.com/review/list/1589736/


1
ok








a

mailto:chi-chu@tschang.net


1
ok








img
src
/images/chi-chu.tschang.png
200

1
ok
no alt-Attributeimage/png, missing X-Content-Type-Options nosniff

Cache-Control: public, max-age=0 - max-age too short.
No GZip - 277542 Bytes






img
src
/images/chichutschanglogo.jpg
200

1
ok
no alt-Attributeimage/jpeg, missing X-Content-Type-Options nosniff

Cache-Control: public, max-age=0 - max-age too short.
No GZip - 92381 Bytes






link
icon
/images/tschang.ico
200

1
ok
image/x-icon, missing X-Content-Type-Options nosniff

Cache-Control: public, max-age=0 - max-age too short.
No GZip - 23462 Bytes






link
shortcut icon
data:;base64,iVBORw0KGgo=


1
ok








link
stylesheet
../stylesheets/style.css
404
Not Found
1
missing file
text/html; charset=utf-8, missing X-Content-Type-Options nosniff

1712 Bytes






link
stylesheet
https://pro.fontawesome.com/releases/v5.6.3/css/all.css
200

1
ok
text/css, missing X-Content-Type-Options nosniff

Cache-Control: max-age=31556926 - with long duration found.
GZip: 15608/76169 Bytes




Server-Header Access-Control-Allow-Origin: *
Cross-Origin Resource Sharing (CORS) supported

integrity: sha384-LRlmVvLKVApDVGuspQFnRQJjkv0P7/YFrw84YYQtmYG4nK8c+M+NlmYDCv0rKWpG
crossorigin: anonymous
No SRI Parse errorvalid


Content loaded via url("...")

../webfonts/fa-brands-400.eot1
../webfonts/fa-brands-400.eot?#iefix1
../webfonts/fa-brands-400.svg#fontawesome1
../webfonts/fa-brands-400.ttf1
../webfonts/fa-brands-400.woff1
../webfonts/fa-brands-400.woff21
../webfonts/fa-light-300.eot1
../webfonts/fa-light-300.eot?#iefix1
../webfonts/fa-light-300.svg#fontawesome1
../webfonts/fa-light-300.ttf1
../webfonts/fa-light-300.woff1
../webfonts/fa-light-300.woff21
../webfonts/fa-regular-400.eot1
../webfonts/fa-regular-400.eot?#iefix1
../webfonts/fa-regular-400.svg#fontawesome1
../webfonts/fa-regular-400.ttf1
../webfonts/fa-regular-400.woff1
../webfonts/fa-regular-400.woff21
../webfonts/fa-solid-900.eot1
../webfonts/fa-solid-900.eot?#iefix1
../webfonts/fa-solid-900.svg#fontawesome1
../webfonts/fa-solid-900.ttf1
../webfonts/fa-solid-900.woff1
../webfonts/fa-solid-900.woff21

link
stylesheet
https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css
200

1
ok
text/css; charset=utf-8, X-Content-Type-Options nosniff found

No Cache-Control - header
GZip: 23841/160403 Bytes




Server-Header Access-Control-Allow-Origin: *
Cross-Origin Resource Sharing (CORS) supported

integrity: sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk
crossorigin: anonymous
No SRI Parse errorvalid


Content loaded via url("...")

data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='%23fff' width='8' height='8' viewBox='0 0 8 8'%3e%3cpath d='M2.75 0l-1.5 1.5L3.75 4l-2.5 2.5L2.75 8l4-4-4-4z'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='%23fff' width='8' height='8' viewBox='0 0 8 8'%3e%3cpath d='M5.25 0l-4 4 4 4 1.5-1.5L4.25 4l2.5-2.5L5.25 0z'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%23dc3545' viewBox='0 0 12 12'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23dc3545' stroke='none'/%3e%3c/svg%3e2
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='-4 -4 8 8'%3e%3ccircle r='3' fill='%23fff'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%280, 0, 0, 0.5%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.5%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='4' height='4' viewBox='0 0 4 4'%3e%3cpath stroke='%23fff' d='M0 2h4'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='4' height='5' viewBox='0 0 4 5'%3e%3cpath fill='%23343a40' d='M2 0L0 2h4zm0 5L0 3h4z'/%3e%3c/svg%3e3
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8' viewBox='0 0 8 8'%3e%3cpath fill='%2328a745' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e2
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8' viewBox='0 0 8 8'%3e%3cpath fill='%23fff' d='M6.564.75l-3.59 3.612-1.538-1.55L0 4.26l2.974 2.99L8 2.193z'/%3e%3c/svg%3e1

meta
content-type
text/html; charset=utf-8


1
ok








meta
author
Chi-Chu Tschang


1
ok








meta
description
chi-chu.tschang.net is the personal website of Chi-Chu Tschang


1
ok








meta
viewport
width=device-width, initial-scale=1.0, user-scalable=no


1
ok








script
src
https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js
200

1
ok
Missing defer / async attribute. application/javascript; charset=utf-8, X-Content-Type-Options nosniff found

Cache-Control: public, max-age=31536000, s-maxage=31536000, immutable - with long duration found.
GZip: 7510/21257 Bytes




Server-Header Access-Control-Allow-Origin: *
Cross-Origin Resource Sharing (CORS) supported

integrity: sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo
crossorigin: anonymous
No SRI Parse errorvalid



script
src
https://code.jquery.com/jquery-3.5.1.slim.min.js
200

1
ok
Missing defer / async attribute. application/javascript; charset=utf-8, missing X-Content-Type-Options nosniff

Cache-Control: max-age=315360000,public - with long duration found.
GZip: 24606/72380 Bytes




Server-Header Access-Control-Allow-Origin: *
Cross-Origin Resource Sharing (CORS) supported

integrity: sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj
crossorigin: anonymous
No SRI Parse errorvalid



script
src
https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js
200

1
ok
Missing defer / async attribute. text/javascript; charset=utf-8, X-Content-Type-Options nosniff found

No Cache-Control - header
GZip: 14885/60174 Bytes




Server-Header Access-Control-Allow-Origin: *
Cross-Origin Resource Sharing (CORS) supported

integrity: sha384-OgVRvuATP1z7JjHLkuOU7Xw704+h835Lr+6QL9UvYjZE3Ipu6Tp75j7Bh/kR0JKI
crossorigin: anonymous
No SRI Parse errorvalid


https://52.52.105.85/
52.52.105.85
a

/


3
ok








a

/learning


1
ok








a

/projects


1
ok








a

/reading


1
ok








a

/resume


1
ok








a

https://ahs.ausdk12.org/


1
ok








a

https://fresnostate.edu/kremen/


1
ok








a

https://pgp.mit.edu/pks/lookup?op=get&search=0x152A5675369F6C28


1
ok








a

https://twitter.com/tschang


1
ok








a

https://www.businessweek.com/stories/2008-02-11/a-french-water-companys-cautionary-tale-in-chinabusinessweek-business-news-stock-market-and-financial-advice


1
ok








a

https://www.businessweek.com/stories/2008-04-09/the-new-e-spionage-threat


1
ok








a

https://www.businessweek.com/stories/2008-08-15/empty-seats-at-chinas-sellout-olympicsbusinessweek-business-news-stock-market-and-financial-advice


1
ok








a

https://www.businessweek.com/stories/2008-10-01/dangerous-fakes


1
ok








a

https://www.businessweek.com/stories/2008-12-30/the-squeeze-at-chinas-baidu


1
ok








a

https://www.github.com/chichutschang/


1
ok








a

https://www.goodreads.com/book/show/33313.Kitchen_Confidential


1
ok








a

https://www.goodreads.com/review/list/1589736/


1
ok








a

mailto:chi-chu@tschang.net


1
ok








img
src
/images/chi-chu.tschang.png
200

1
ok
no alt-Attributeimage/png, missing X-Content-Type-Options nosniff

Cache-Control: public, max-age=0 - max-age too short.
No GZip - 277542 Bytes






img
src
/images/chichutschanglogo.jpg
200

1
ok
no alt-Attributeimage/jpeg, missing X-Content-Type-Options nosniff

Cache-Control: public, max-age=0 - max-age too short.
No GZip - 92381 Bytes






link
icon
/images/tschang.ico
200

1
ok
image/x-icon, missing X-Content-Type-Options nosniff

Cache-Control: public, max-age=0 - max-age too short.
No GZip - 23462 Bytes






link
shortcut icon
data:;base64,iVBORw0KGgo=


1
ok








link
stylesheet
../stylesheets/style.css
200

1
ok
text/css; charset=UTF-8, missing X-Content-Type-Options nosniff

Cache-Control: public, max-age=0 - max-age too short.
GZip: 865/4297 Bytes




local SRI possible, possible hash-values:

sha256-pSgtGZJBLuZlOy3kRblEX8aPSBFeibdY5yr+FlaYf0A=
sha384-dHwlPqR++yXRNYB1CUEJhDyUAqIFruStVRtw+LYYHANAQ+lMgba68Dpesx+C9htF
sha512-4bxLcrbCx9vzvyioEz0mocS1v7SSBhkNCezQvzCnD+QOYg1YvBzFOFu8SUNWSaIh5GhgsFM3GYzCyxPpFjRkuQ==

<link rel="stylesheet" href="../stylesheets/style.css" crossorigin="anonymous" integrity="sha256-pSgtGZJBLuZlOy3kRblEX8aPSBFeibdY5yr+FlaYf0A=" />



Content loaded via url("...")

/stylesheets/Gotham-Book.otf1
styles.css1

link
stylesheet
https://pro.fontawesome.com/releases/v5.6.3/css/all.css
200

1
ok
text/css, missing X-Content-Type-Options nosniff

Cache-Control: max-age=31556926 - with long duration found.
GZip: 15608/76169 Bytes




Server-Header Access-Control-Allow-Origin: *
Cross-Origin Resource Sharing (CORS) supported

integrity: sha384-LRlmVvLKVApDVGuspQFnRQJjkv0P7/YFrw84YYQtmYG4nK8c+M+NlmYDCv0rKWpG
crossorigin: anonymous
No SRI Parse errorvalid


Content loaded via url("...")

../webfonts/fa-brands-400.eot1
../webfonts/fa-brands-400.eot?#iefix1
../webfonts/fa-brands-400.svg#fontawesome1
../webfonts/fa-brands-400.ttf1
../webfonts/fa-brands-400.woff1
../webfonts/fa-brands-400.woff21
../webfonts/fa-light-300.eot1
../webfonts/fa-light-300.eot?#iefix1
../webfonts/fa-light-300.svg#fontawesome1
../webfonts/fa-light-300.ttf1
../webfonts/fa-light-300.woff1
../webfonts/fa-light-300.woff21
../webfonts/fa-regular-400.eot1
../webfonts/fa-regular-400.eot?#iefix1
../webfonts/fa-regular-400.svg#fontawesome1
../webfonts/fa-regular-400.ttf1
../webfonts/fa-regular-400.woff1
../webfonts/fa-regular-400.woff21
../webfonts/fa-solid-900.eot1
../webfonts/fa-solid-900.eot?#iefix1
../webfonts/fa-solid-900.svg#fontawesome1
../webfonts/fa-solid-900.ttf1
../webfonts/fa-solid-900.woff1
../webfonts/fa-solid-900.woff21

link
stylesheet
https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css
200

1
ok
text/css; charset=utf-8, X-Content-Type-Options nosniff found

No Cache-Control - header
GZip: 23841/160403 Bytes




Server-Header Access-Control-Allow-Origin: *
Cross-Origin Resource Sharing (CORS) supported

integrity: sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk
crossorigin: anonymous
No SRI Parse errorvalid


Content loaded via url("...")

data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='%23fff' width='8' height='8' viewBox='0 0 8 8'%3e%3cpath d='M2.75 0l-1.5 1.5L3.75 4l-2.5 2.5L2.75 8l4-4-4-4z'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='%23fff' width='8' height='8' viewBox='0 0 8 8'%3e%3cpath d='M5.25 0l-4 4 4 4 1.5-1.5L4.25 4l2.5-2.5L5.25 0z'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%23dc3545' viewBox='0 0 12 12'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23dc3545' stroke='none'/%3e%3c/svg%3e2
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='-4 -4 8 8'%3e%3ccircle r='3' fill='%23fff'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%280, 0, 0, 0.5%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.5%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='4' height='4' viewBox='0 0 4 4'%3e%3cpath stroke='%23fff' d='M0 2h4'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='4' height='5' viewBox='0 0 4 5'%3e%3cpath fill='%23343a40' d='M2 0L0 2h4zm0 5L0 3h4z'/%3e%3c/svg%3e3
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8' viewBox='0 0 8 8'%3e%3cpath fill='%2328a745' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e2
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8' viewBox='0 0 8 8'%3e%3cpath fill='%23fff' d='M6.564.75l-3.59 3.612-1.538-1.55L0 4.26l2.974 2.99L8 2.193z'/%3e%3c/svg%3e1

meta
content-type
text/html; charset=utf-8


1
ok








meta
author
Chi-Chu Tschang


1
ok








meta
description
chi-chu.tschang.net is the personal website of Chi-Chu Tschang


1
ok








meta
viewport
width=device-width, initial-scale=1.0, user-scalable=no


1
ok








script
src
https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js
200

1
ok
Missing defer / async attribute. application/javascript; charset=utf-8, X-Content-Type-Options nosniff found

Cache-Control: public, max-age=31536000, s-maxage=31536000, immutable - with long duration found.
GZip: 7510/21257 Bytes




Server-Header Access-Control-Allow-Origin: *
Cross-Origin Resource Sharing (CORS) supported

integrity: sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo
crossorigin: anonymous
No SRI Parse errorvalid



script
src
https://code.jquery.com/jquery-3.5.1.slim.min.js
200

1
ok
Missing defer / async attribute. application/javascript; charset=utf-8, missing X-Content-Type-Options nosniff

Cache-Control: max-age=315360000,public - with long duration found.
GZip: 24606/72380 Bytes




Server-Header Access-Control-Allow-Origin: *
Cross-Origin Resource Sharing (CORS) supported

integrity: sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj
crossorigin: anonymous
No SRI Parse errorvalid



script
src
https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js
200

1
ok
Missing defer / async attribute. text/javascript; charset=utf-8, X-Content-Type-Options nosniff found

No Cache-Control - header
GZip: 14885/60174 Bytes




Server-Header Access-Control-Allow-Origin: *
Cross-Origin Resource Sharing (CORS) supported

integrity: sha384-OgVRvuATP1z7JjHLkuOU7Xw704+h835Lr+6QL9UvYjZE3Ipu6Tp75j7Bh/kR0JKI
crossorigin: anonymous
No SRI Parse errorvalid


https://54.177.68.202/
54.177.68.202
a

/


3
ok








a

/learning


1
ok








a

/projects


1
ok








a

/reading


1
ok








a

/resume


1
ok








a

https://ahs.ausdk12.org/


1
ok








a

https://fresnostate.edu/kremen/


1
ok








a

https://pgp.mit.edu/pks/lookup?op=get&search=0x152A5675369F6C28


1
ok








a

https://twitter.com/tschang


1
ok








a

https://www.businessweek.com/stories/2008-02-11/a-french-water-companys-cautionary-tale-in-chinabusinessweek-business-news-stock-market-and-financial-advice


1
ok








a

https://www.businessweek.com/stories/2008-04-09/the-new-e-spionage-threat


1
ok








a

https://www.businessweek.com/stories/2008-08-15/empty-seats-at-chinas-sellout-olympicsbusinessweek-business-news-stock-market-and-financial-advice


1
ok








a

https://www.businessweek.com/stories/2008-10-01/dangerous-fakes


1
ok








a

https://www.businessweek.com/stories/2008-12-30/the-squeeze-at-chinas-baidu


1
ok








a

https://www.github.com/chichutschang/


1
ok








a

https://www.goodreads.com/book/show/33313.Kitchen_Confidential


1
ok








a

https://www.goodreads.com/review/list/1589736/


1
ok








a

mailto:chi-chu@tschang.net


1
ok








img
src
/images/chi-chu.tschang.png
200

1
ok
no alt-Attributeimage/png, missing X-Content-Type-Options nosniff

Cache-Control: public, max-age=0 - max-age too short.
No GZip - 277542 Bytes






img
src
/images/chichutschanglogo.jpg
200

1
ok
no alt-Attributeimage/jpeg, missing X-Content-Type-Options nosniff

Cache-Control: public, max-age=0 - max-age too short.
No GZip - 92381 Bytes






link
icon
/images/tschang.ico
200

1
ok
image/x-icon, missing X-Content-Type-Options nosniff

Cache-Control: public, max-age=0 - max-age too short.
No GZip - 23462 Bytes






link
shortcut icon
data:;base64,iVBORw0KGgo=


1
ok








link
stylesheet
../stylesheets/style.css
200

1
ok
text/css; charset=UTF-8, missing X-Content-Type-Options nosniff

Cache-Control: public, max-age=0 - max-age too short.
GZip: 865/4297 Bytes




local SRI possible, possible hash-values:

sha256-pSgtGZJBLuZlOy3kRblEX8aPSBFeibdY5yr+FlaYf0A=
sha384-dHwlPqR++yXRNYB1CUEJhDyUAqIFruStVRtw+LYYHANAQ+lMgba68Dpesx+C9htF
sha512-4bxLcrbCx9vzvyioEz0mocS1v7SSBhkNCezQvzCnD+QOYg1YvBzFOFu8SUNWSaIh5GhgsFM3GYzCyxPpFjRkuQ==

<link rel="stylesheet" href="../stylesheets/style.css" crossorigin="anonymous" integrity="sha256-pSgtGZJBLuZlOy3kRblEX8aPSBFeibdY5yr+FlaYf0A=" />



Content loaded via url("...")

/stylesheets/Gotham-Book.otf1
styles.css1

link
stylesheet
https://pro.fontawesome.com/releases/v5.6.3/css/all.css
200

1
ok
text/css, missing X-Content-Type-Options nosniff

Cache-Control: max-age=31556926 - with long duration found.
GZip: 15608/76169 Bytes




Server-Header Access-Control-Allow-Origin: *
Cross-Origin Resource Sharing (CORS) supported

integrity: sha384-LRlmVvLKVApDVGuspQFnRQJjkv0P7/YFrw84YYQtmYG4nK8c+M+NlmYDCv0rKWpG
crossorigin: anonymous
No SRI Parse errorvalid


Content loaded via url("...")

../webfonts/fa-brands-400.eot1
../webfonts/fa-brands-400.eot?#iefix1
../webfonts/fa-brands-400.svg#fontawesome1
../webfonts/fa-brands-400.ttf1
../webfonts/fa-brands-400.woff1
../webfonts/fa-brands-400.woff21
../webfonts/fa-light-300.eot1
../webfonts/fa-light-300.eot?#iefix1
../webfonts/fa-light-300.svg#fontawesome1
../webfonts/fa-light-300.ttf1
../webfonts/fa-light-300.woff1
../webfonts/fa-light-300.woff21
../webfonts/fa-regular-400.eot1
../webfonts/fa-regular-400.eot?#iefix1
../webfonts/fa-regular-400.svg#fontawesome1
../webfonts/fa-regular-400.ttf1
../webfonts/fa-regular-400.woff1
../webfonts/fa-regular-400.woff21
../webfonts/fa-solid-900.eot1
../webfonts/fa-solid-900.eot?#iefix1
../webfonts/fa-solid-900.svg#fontawesome1
../webfonts/fa-solid-900.ttf1
../webfonts/fa-solid-900.woff1
../webfonts/fa-solid-900.woff21

link
stylesheet
https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css
200

1
ok
text/css; charset=utf-8, X-Content-Type-Options nosniff found

No Cache-Control - header
GZip: 23841/160403 Bytes




Server-Header Access-Control-Allow-Origin: *
Cross-Origin Resource Sharing (CORS) supported

integrity: sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk
crossorigin: anonymous
No SRI Parse errorvalid


Content loaded via url("...")

data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='%23fff' width='8' height='8' viewBox='0 0 8 8'%3e%3cpath d='M2.75 0l-1.5 1.5L3.75 4l-2.5 2.5L2.75 8l4-4-4-4z'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='%23fff' width='8' height='8' viewBox='0 0 8 8'%3e%3cpath d='M5.25 0l-4 4 4 4 1.5-1.5L4.25 4l2.5-2.5L5.25 0z'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%23dc3545' viewBox='0 0 12 12'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23dc3545' stroke='none'/%3e%3c/svg%3e2
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='-4 -4 8 8'%3e%3ccircle r='3' fill='%23fff'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%280, 0, 0, 0.5%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.5%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='4' height='4' viewBox='0 0 4 4'%3e%3cpath stroke='%23fff' d='M0 2h4'/%3e%3c/svg%3e1
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='4' height='5' viewBox='0 0 4 5'%3e%3cpath fill='%23343a40' d='M2 0L0 2h4zm0 5L0 3h4z'/%3e%3c/svg%3e3
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8' viewBox='0 0 8 8'%3e%3cpath fill='%2328a745' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e2
data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8' viewBox='0 0 8 8'%3e%3cpath fill='%23fff' d='M6.564.75l-3.59 3.612-1.538-1.55L0 4.26l2.974 2.99L8 2.193z'/%3e%3c/svg%3e1

meta
content-type
text/html; charset=utf-8


1
ok








meta
author
Chi-Chu Tschang


1
ok








meta
description
chi-chu.tschang.net is the personal website of Chi-Chu Tschang


1
ok








meta
viewport
width=device-width, initial-scale=1.0, user-scalable=no


1
ok








script
src
https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js
200

1
ok
Missing defer / async attribute. application/javascript; charset=utf-8, X-Content-Type-Options nosniff found

Cache-Control: public, max-age=31536000, s-maxage=31536000, immutable - with long duration found.
GZip: 7510/21257 Bytes




Server-Header Access-Control-Allow-Origin: *
Cross-Origin Resource Sharing (CORS) supported

integrity: sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo
crossorigin: anonymous
No SRI Parse errorvalid



script
src
https://code.jquery.com/jquery-3.5.1.slim.min.js
200

1
ok
Missing defer / async attribute. application/javascript; charset=utf-8, missing X-Content-Type-Options nosniff

Cache-Control: max-age=315360000,public - with long duration found.
GZip: 24606/72380 Bytes




Server-Header Access-Control-Allow-Origin: *
Cross-Origin Resource Sharing (CORS) supported

integrity: sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj
crossorigin: anonymous
No SRI Parse errorvalid



script
src
https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js
200

1
ok
Missing defer / async attribute. text/javascript; charset=utf-8, X-Content-Type-Options nosniff found

No Cache-Control - header
GZip: 14885/60174 Bytes




Server-Header Access-Control-Allow-Origin: *
Cross-Origin Resource Sharing (CORS) supported

integrity: sha384-OgVRvuATP1z7JjHLkuOU7Xw704+h835Lr+6QL9UvYjZE3Ipu6Tp75j7Bh/kR0JKI
crossorigin: anonymous
No SRI Parse errorvalid



12. Nameserver - IP-Adresses

Required Root-climbing DNS-Queries to find ip addresses of all Name Servers: ns-1100.awsdns-09.org, ns-1931.awsdns-49.co.uk, ns-300.awsdns-37.com, ns-759.awsdns-30.net

QNr.DomainTypeNS used
1
org
NS
k.root-servers.net (2001:7fd::1)

Answer: a0.org.afilias-nst.info, a2.org.afilias-nst.info, b0.org.afilias-nst.org, b2.org.afilias-nst.org, c0.org.afilias-nst.info, d0.org.afilias-nst.org
2
ns-1100.awsdns-09.org
NS
a0.org.afilias-nst.info (2001:500:e::1)

Answer: g-ns-1036.awsdns-09.org, g-ns-137.awsdns-09.org, g-ns-1609.awsdns-09.org, g-ns-715.awsdns-09.org

Answer: g-ns-1036.awsdns-09.org
205.251.196.12, 2600:9000:5304:c00::1

Answer: g-ns-137.awsdns-09.org
205.251.192.137, 2600:9000:5300:8900::1

Answer: g-ns-1609.awsdns-09.org
205.251.198.73, 2600:9000:5306:4900::1

Answer: g-ns-715.awsdns-09.org
205.251.194.203, 2600:9000:5302:cb00::1
3
uk
NS
g.root-servers.net (2001:500:12::d0d)

Answer: dns1.nic.uk, dns2.nic.uk, dns3.nic.uk, dns4.nic.uk, nsa.nic.uk, nsb.nic.uk, nsc.nic.uk, nsd.nic.uk
4
ns-1931.awsdns-49.co.uk
NS
dns1.nic.uk (2a01:618:400::1)

Answer: g-ns-1524.awsdns-49.co.uk, g-ns-1845.awsdns-49.co.uk, g-ns-369.awsdns-49.co.uk, g-ns-945.awsdns-49.co.uk

Answer: g-ns-1524.awsdns-49.co.uk
205.251.197.244, 2600:9000:5305:f400::1

Answer: g-ns-1845.awsdns-49.co.uk
205.251.199.53, 2600:9000:5307:3500::1

Answer: g-ns-369.awsdns-49.co.uk
205.251.193.113, 2600:9000:5301:7100::1

Answer: g-ns-945.awsdns-49.co.uk
205.251.195.177, 2600:9000:5303:b100::1
5
com
NS
k.root-servers.net (2001:7fd::1)

Answer: a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net, e.gtld-servers.net, f.gtld-servers.net, g.gtld-servers.net, h.gtld-servers.net, i.gtld-servers.net, j.gtld-servers.net, k.gtld-servers.net, l.gtld-servers.net, m.gtld-servers.net
6
ns-300.awsdns-37.com
NS
e.gtld-servers.net (2001:502:1ca1::30)

Answer: g-ns-1189.awsdns-37.com, g-ns-1765.awsdns-37.com, g-ns-38.awsdns-37.com, g-ns-613.awsdns-37.com

Answer: g-ns-1189.awsdns-37.com
205.251.196.165, 2600:9000:5304:a500::1

Answer: g-ns-1765.awsdns-37.com
205.251.198.229, 2600:9000:5306:e500::1

Answer: g-ns-38.awsdns-37.com
205.251.192.38, 2600:9000:5300:2600::1

Answer: g-ns-613.awsdns-37.com
205.251.194.101, 2600:9000:5302:6500::1
7
net
NS
d.root-servers.net (2001:500:2d::d)

Answer: a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net, e.gtld-servers.net, f.gtld-servers.net, g.gtld-servers.net, h.gtld-servers.net, i.gtld-servers.net, j.gtld-servers.net, k.gtld-servers.net, l.gtld-servers.net, m.gtld-servers.net
8
ns-759.awsdns-30.net
NS
a.gtld-servers.net (2001:503:a83e::2:30)

Answer: g-ns-1374.awsdns-30.net, g-ns-1950.awsdns-30.net, g-ns-479.awsdns-30.net, g-ns-800.awsdns-30.net

Answer: g-ns-1374.awsdns-30.net
205.251.197.94, 2600:9000:5305:5e00::1

Answer: g-ns-1950.awsdns-30.net
205.251.199.158, 2600:9000:5307:9e00::1

Answer: g-ns-479.awsdns-30.net
205.251.193.223, 2600:9000:5301:df00::1

Answer: g-ns-800.awsdns-30.net
205.251.195.32, 2600:9000:5303:2000::1
9
ns-1100.awsdns-09.org: 205.251.196.76
A
g-ns-1036.awsdns-09.org (2600:9000:5304:c00::1)
10
ns-1100.awsdns-09.org: 2600:9000:5304:4c00::1
AAAA
g-ns-1036.awsdns-09.org (2600:9000:5304:c00::1)
11
ns-1931.awsdns-49.co.uk: 205.251.199.139
A
g-ns-1524.awsdns-49.co.uk (2600:9000:5305:f400::1)
12
ns-1931.awsdns-49.co.uk: 2600:9000:5307:8b00::1
AAAA
g-ns-1524.awsdns-49.co.uk (2600:9000:5305:f400::1)
13
ns-300.awsdns-37.com: 205.251.193.44
A
g-ns-1189.awsdns-37.com (2600:9000:5304:a500::1)
14
ns-300.awsdns-37.com: 2600:9000:5301:2c00::1
AAAA
g-ns-1189.awsdns-37.com (2600:9000:5304:a500::1)
15
ns-759.awsdns-30.net: 205.251.194.247
A
g-ns-1374.awsdns-30.net (2600:9000:5305:5e00::1)
16
ns-759.awsdns-30.net: 2600:9000:5302:f700::1
AAAA
g-ns-1374.awsdns-30.net (2600:9000:5305:5e00::1)


13. CAA - Entries

DomainnameflagNameValue∑ Queries∑ Timeout
chi-chu.tschang.net
0

no CAA entry found
1
0
tschang.net
0

no CAA entry found
1
0
net
0

no CAA entry found
1
0


14. TXT - Entries

DomainnameTXT EntryStatus∑ Queries∑ Timeout
tschang.net

ok
1
0
chi-chu.tschang.net

ok
1
0
_acme-challenge.chi-chu.tschang.net

Name Error - The domain name does not exist
1
0
_acme-challenge.chi-chu.tschang.net.tschang.net

Name Error - The domain name does not exist
1
0
_acme-challenge.chi-chu.tschang.net.chi-chu.tschang.net

Name Error - The domain name does not exist
1
0


15. Portchecks

No Port checks



Permalink: https://check-your-website.server-daten.de/?i=b2dfc5af-6a62-4050-88e1-474228ae8408


Last Result: https://check-your-website.server-daten.de/?q=chi-chu.tschang.net - 2020-07-27 03:33:04


Do you like this page? Support this tool, add a link on your page:

<a href="https://check-your-website.server-daten.de/?q=chi-chu.tschang.net" target="_blank">Check this Site: chi-chu.tschang.net</a>