A test authorization for www.internal.cz to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
No valid IP addresses found for www.internal.cz
Requests made to the domain
Request to: www.internal.cz/78.24.14.77, Result: [Address=78.24.14.77,Address Type=IPv4,Server=Apache,HTTP Status=404], Issue:
Trace:
@0ms: Making a request to http://www.internal.cz/.well-known/acme-challenge/letsdebug-test (using initial IP 78.24.14.77)
@0ms: Dialing 78.24.14.77
@206ms: Server response: HTTP 404 Not Found
A and AAAA records found for this domain
www.internal.cz. 0 IN A 78.24.14.77
Challenge update failures for www.internal.cz in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/89926016
acme: error code 400 "urn:ietf:params:acme:error:dns": No valid IP addresses found for www.internal.cz
The IANA public suffix is the TLD of the Registered Domain
The TLD for www.internal.cz is: cz
5 Certificates contributing to rate limits for this domain
Serial: 306439774720554344681362337899032141513203
NotBefore: 2020-05-05 06:10:16 +0000 UTC
Names: [internal.cz]
Serial: 265118950095939794510143765372937027879209
NotBefore: 2020-05-04 08:39:00 +0000 UTC
Names: [internal.cz]
Serial: 388019438214662802666732820434061612313986
NotBefore: 2020-05-03 15:06:14 +0000 UTC
Names: [internal.cz]
Serial: 308449333942878607420466011555391420541751
NotBefore: 2020-05-03 14:59:17 +0000 UTC
Names: [internal.cz]
Serial: 318399164256684230430363442983185545932876
NotBefore: 2020-05-03 00:09:44 +0000 UTC
Names: [internal.cz]
The current status.io status for Let's Encrypt
Operational