ci.possumlab.com 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=Microsoft-HTTPAPI/2.0,HTTP Status=404] vs [Address Type=IPv4,Server=nginx/1.15.10,HTTP Status=308,Number of Redirects=1,Final HTTP Status=200]
Requests made to the domain
Request to: ci.possumlab.com/52.165.36.77, Result: [Address Type=IPv4,Server=Microsoft-HTTPAPI/2.0,HTTP Status=404], Issue:
Trace:
@0ms: Making a request to http://ci.possumlab.com/.well-known/acme-challenge/letsdebug-test (using initial IP 52.165.36.77)
@0ms: Dialing 52.165.36.77
@80ms: Server response: HTTP 404 Not Found
Request to: ci.possumlab.com/40.122.110.221, Result: [Address Type=IPv4,Server=nginx/1.15.10,HTTP Status=308,Number of Redirects=1,Final HTTP Status=200], Issue:
Trace:
@0ms: Making a request to http://ci.possumlab.com/.well-known/acme-challenge/letsdebug-test (using initial IP 40.122.110.221)
@0ms: Dialing 40.122.110.221
@80ms: Server response: HTTP 308 Permanent Redirect
@80ms: Received redirect to https://ci.possumlab.com/.well-known/acme-challenge/letsdebug-test
@80ms: Dialing 40.122.110.221
@245ms: Server response: HTTP 200 OK
A and AAAA records found for this domain
ci.possumlab.com. 0 IN A 52.165.36.77
ci.possumlab.com. 0 IN A 40.122.110.221
Challenge update failures for ci.possumlab.com in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/36559742
acme: error code 403 "urn:ietf:params:acme:error:unauthorized": Invalid response from http://ci.possumlab.com/.well-known/acme-challenge/09RhZjhnN7W_AzLZOgeLmnDpHG35qAtV11cdYeFwlcA [52.165.36.77]: "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01//EN\"\"http://www.w3.org/TR/html4/strict.dtd\">\r\n<HTML><HEAD><TITLE>Not Found</TITLE>\r"
The IANA public suffix is the TLD of the Registered Domain
The TLD for ci.possumlab.com is: com
The current status.io status for Let's Encrypt
Operational