scammell.co.uk has both AAAA (IPv6) and A (IPv4) records. While they both appear to be accessible on the network, we have detected that they produce differing results when sent an ACME HTTP validation request. This may indicate that the IPv4 and IPv6 addresses may unintentionally point to different servers, which would cause validation to fail.
[Address Type=IPv4,Server=nginx,HTTP Status=301,Number of Redirects=2,Final HTTP Status=404] vs [Address Type=IPv6,Server=nginx,HTTP Status=404]
Requests made to the domain
Request to: scammell.co.uk/2a03:b0c0:3:d0::54:f001, Result: [Address Type=IPv6,Server=nginx,HTTP Status=404], Issue:
Trace:
@0ms: Making a request to http://scammell.co.uk/.well-known/acme-challenge/letsdebug-test (using initial IP 2a03:b0c0:3:d0::54:f001)
@0ms: Dialing 2a03:b0c0:3:d0::54:f001
@192ms: Server response: HTTP 404 404 Not Found
Request to: scammell.co.uk/188.166.195.182, Result: [Address Type=IPv4,Server=nginx,HTTP Status=301,Number of Redirects=2,Final HTTP Status=404], Issue:
Trace:
@0ms: Making a request to http://scammell.co.uk/.well-known/acme-challenge/letsdebug-test (using initial IP 188.166.195.182)
@0ms: Dialing 188.166.195.182
@180ms: Server response: HTTP 301 301 Moved Permanently
@180ms: Received redirect to https://scammell.co.uk/.well-known/acme-challenge/letsdebug-test
@181ms: Dialing 188.166.195.182
@959ms: Server response: HTTP 301 301 Moved Permanently
@960ms: Received redirect to https://www.scammell.co.uk/.well-known/acme-challenge/letsdebug-test
@1220ms: Dialing 2a03:b0c0:3:d0::54:f001
@2082ms: Server response: HTTP 404 404 Not Found
A and AAAA records found for this domain
scammell.co.uk. 0 IN A 188.166.195.182
scammell.co.uk. 0 IN AAAA 2a03:b0c0:3:d0::54:f001
Challenge update failures for scammell.co.uk in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/1230345
acme: error code 403 "urn:ietf:params:acme:error:unauthorized": Invalid response from http://scammell.co.uk/.well-known/acme-challenge/d12N0El9cj5A56Chi0_Y3V92_9lF9luzvQfztDr23Yg: "<html>
<head><title>404 Not Found</title></head>
<body bgcolor="white">
<center><h1>404 Not Found</h1></center>
<hr><center>"
The IANA public suffix is the TLD of the Registered Domain
The TLD for scammell.co.uk is: co.uk
Certificates contributing to rate limits for this domain
Serial: 286289690943977669211178873754681206661384
NotBefore: 2018-05-23 17:08:42 +0000 UTC
Names: [scammell.co.uk www.scammell.co.uk]
The current status.io status for Let's Encrypt
Operational