Check DNS, Urls + Redirects, Certificates and Content of your Website
0 in Queue, 0 of max. 5 Checks
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Hall of Fame -
A+
and
A
Short FAQ
show
How do I use that tool?
Insert a valid domain name, without http:// or https://, without www:
yourdomain.com
If you check a domain name, non-www and www (if defined), http and https is checked.
Add a port or / and a file and path:
yourdomain.com:5001
yourdomain.com/subfolder-of-your-domain
yourdomain.com/subfolder/file-to-check.html
yourdomain.com:5001/subfolder/file-to-check.html
Insert a valid / public ipv4- or ipv6-address:
1.1.1.1
2a01:238:301b::1226
ipv6 with port:
[2a01:238:301b::1226]:443
If you check an ip address, you may add your domain name in the "hostname" field.
That's helpful if your domain has an ipv4-address and if you want to add an ipv6-address.
You can check your ipv6-address without having an AAAA-record in your DNS.
Checking ip addresses no DNS-checks are done -> that's very short.
If you check a port, normally one check (http or https) is wrong. Ignore that wrong result. Typical programs use only one protocol with one port. There are some programs (Ookla Speedtest, VestaCP, WebMin) who are able to use one port with both protocols http/https.
Insert a valid
Internationalized Domain Name
(IDN)
First click: The IDN is transformed to the xn-- version.
Second click: The check starts with the xn-- version.
The result of an IDN-check shows both versions.
Sometimes special code parts are updated. That requires, that no check is running. So new jobs are added to the
Queue
, but not executed (max. 0 Checks). Wait some minutes.
QR Code of your domain name required? Double-click in the text box.
Which Grade should I have, if the domain name has a website?
If it is your first certificate: Grade
B
without HSTS and without Cookie errors.
If your certificate renew works: Grade
A
with HSTS. If your certificate renew
really works
, you may add the domain to the Google Preload list. Then browsers use always https to connect your domain. That's Grade
A+
.
Short:
Fatal:
Domain doesn't end with a public suffix, isn't registered, private ip addresses are defined (
Z
,
U
,
Y
).
Port 80 and port 443 must answer, no TCP-errors (
V
,
W
), Timeouts (
T
), Server Errors (
S
)
No global SSL error or only Tls.1.3 (
P
), http over port 443 or https over port 80 (
Q
)
All certificates are valid (no
N
), no misconfiguration (
M
), no wrong redirects (
R
)
No old/weak connection or insecure Cipher Suites (
O
), no Loop (
L
), no different ip addresses of the same domain name with different answers (
K
)
No mixed content / missing resources, errors in svg definitions etc. (
I
)
If you have one of these errors, users may have problems using your site.
Better:
No http result (
H
)
Correct redirects (no
F
,
E
,
D
)
If non-www + www is defined: One destination (no
C
)
No cookies via http or cookie errors, all https cookies secure, SameSite-Attribute (
B
without warnings)
If HSTS is defined: No HSTS-parse errors
If you use HSTS and your certificate is invalid (wrong domain name, expired, revoked), visitors can't create an exception in their browser. So it's impossible to visit your site. HSTS requires an
always valid certificate
, so you shouldn't add HSTS if you don't know your certificate renew works.
But if the certificate renew works, HSTS + Preload is an amazing feature. Browsers connect your domain
only
via https, so it's impossible to add cookies via http.
I dont't run a website, I want to check my mail server ...
May be you have a pure mail server without a website. Then check it.
All standard mail ports are checked: 25, 110, 143, 465, 587, 993, 995. With their certificates, port 25 / 587 via STARTTLS.
See the Connections- and the Portcheck-Part.
Check your mail server Cipher Suites: Port 25, 465, 587, 993, 995.
Port 25 / 587 have an additional Open-Relay-Check. That's tested
after
switching to TLS via STARTTLS.
Some informations are domain-specific. If you check mail.yourdomain.net, you won't see a MX-result (because you don't have own MX entries with mail.yourdomain.net). Instead check yourdomain.net.
The result-calculation is website-specific. If you check a pure mail server without port 80 / 443, ignore the grade.
Cipher Suites...
219 Cipher Suites are checked with an own-compiled OpenSsl-Version 1.1.1 (started 2022-08-09). That works with ipv4 and ipv6
That version checks some old and normally deactivated ciphers: RC4, -NULL-, anonymous ciphers.
15 additional Ciphers are checked with the old OpenSsl 0.9.8. Ciphers with MD5, Export-Ciphers. That doesn't work with IPv6. These Ciphers are removed in OpenSsl 1.0.2.
Official versions: 1.1.1 doesn't check weak ciphers, 1.0.2 doesn't work with ipv6. Using these official versions it was impossible to check ipv6 with RC4 / -NULL- / anon.
Check of one combination Domain + IP + Port: Max. 60 - 120 seconds. Longer: Your configuration is too slow or you use too much Cipher Suites. Max. 10 - 20 are required. Half of all Cipher Checks need max. 120 seconds, 2 checks per second.
Ssl2 / Ssl3 active, insecure Ciphers or missing FS (Forward Secrecy) - Grade O. That's a global server configuration, so all ports are used to calculate the result.
Older results are not recalculated, so you may see results Grade B + no FS etc.
Check
Find
...
skip EDNS-Check
skip Content-Check
check links
Find
∑
A+
Top + Preload
607
A
Top
2413
B
no HSTS, unsecure Cookies
10868
C
Many http status 200
5939
D
redir http ⇒ http
592
E
http ⇒ https other domain
5647
F
https ⇒ http
883
H
result http
6883
I
Content problems
17580
J
General Configuration
1925
K
ip addresses with diff. status
165
L
Loop - fatal
3099
M
Misconfiguration
5548
N
Certificate not trusted
68845
O
old connection
2411
P
Tls-Protocol error
4079
Q
http sent over port 443
4569
R
redir not existing domain
863
S
Server error (500)
8323
T
Timeout
37380
U
Unknown - no dns / wrong IDN
12400
V
Connect failure
33319
W
wrong Web-Response
7302
X
DNS-problem Nameserver
43828
Y
private IP
5610
Z
private, tld not in PSL
3420
⁕
running jobs
0
⁂
Queue
0
#
error
0
started
2018-10-27
1,392 days
Domains
211.57 / day
294,499
last 24 h
Dom./Checks
125/162
Checks
315.97 / day
439,830
Current
jakethomas.de
H
sherpame.fr
V
adaix-gre.com
I
microk8s.dsolab.net
T
wakanda.zapto.org
X
labels.inflohealth.com
X
moncheis.co
V
erp.revitalifeholding.com
X
listeplo.com.ua
V
metrics.elrond.knights-of-cathena.com
V
speedtest.prtel.com:8080
O
heli-ost.ru
X
mail.heli-ost.ru
T
velocityneural.net
C
Hoangphuccomputer.vn
T
mail.fastmgt.com.au
V
apple.com
O
apps.flaisher.net
N
osmanxmpp.tk
N
gaizi.tech
T
85.215.2.226
N
nextiy.com
N
laurian.de
N
jensentone.com
I
busca.rmcnetworks.com.br
T
117.102.180.107.host.secureserver.net
N
vetvidas.com.br
O
bitwarden.infinitecloud.synology.me
P
laurian.de//laurian.de
N
nas.adamwiener.net
Y
Good
hp-67.com
A+
server-daten.de
A+
miarecki.eu
A
api.gengjiawen.com
B
velocityneural.net
C
autobuechwald.ch
C
nimaro.hosting.webwerk.at
C
jakethomas.de
H
frederictonlawyer.com
H
adaix-gre.com
I
jensentone.com
I
accfarm.com
I
dgc-demo.mobileffort.com
I
ergo.de
I
dijy.com
I
cryodata.nl
L
nimaro.hosting.webwerk.at//nimaro.hosting.webwerk.at/
L
app.calltrackingmetrics.com
L
apps.flaisher.net
N
osmanxmpp.tk
N
85.215.2.226
N
nextiy.com
N
laurian.de
N
117.102.180.107.host.secureserver.net
N
laurian.de//laurian.de
N
gold.baer.rwth-aachen.de
N
suvs.com
N
177.71.235.160//177.71.235.160/
N
ec2-177-71-235-160.sa-east-1.compute.amazonaws.com
N
177.71.235.160
N
Worst
nas.adamwiener.net
Y
godofdebug.buzz
Y
share.foodieconnections.com
Y
wakanda.zapto.org
X
labels.inflohealth.com
X
erp.revitalifeholding.com
X
heli-ost.ru
X
kayteks.netadim.com.tr
X
kayteks.netadim.com
X
fmslx.smphoto.com
X
sonnun.net
X
apprtest.testcenter.kz
X
dev.dtac.co.th
X
eragripes.website
X
ykapuler.ddns.net
X
gioc.kiev.ua
X
noze.sk
X
astu.edu.et
X
thelowendserver.asuscomm.com
X
fadx-racing.de:30359
X
erpocr.tk
X
titanonline.mynetgear.com
X
monteverde.zapto.org
X
pernasetti.com
X
omv.spaceportvb.com
X
jenkins.rennie.com
X
api-dprisa.dprisa.com.mx
X
apple-pay-gateway.apple.com//apple-pay-gateway.apple.com
W
sherpame.fr
V
moncheis.co
V
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