Let's Debug

Test result for t42.dyndns.org using http-01

Debug
Requests made to the domain
Request to: t42.dyndns.org/78.30.56.133, Result: [Address=78.30.56.133,Address Type=IPv4,Server=nginx,HTTP Status=302,Number of Redirects=1,Final HTTP Status=200], Issue:
Trace:
@0ms: Making a request to http://t42.dyndns.org/.well-known/acme-challenge/letsdebug-test (using initial IP 78.30.56.133)
@0ms: Dialing 78.30.56.133
@283ms: Server response: HTTP 302 Moved Temporarily
@283ms: Received redirect to http://t42.dyndns.org/ui/
@283ms: Dialing 78.30.56.133
@574ms: Server response: HTTP 200 OK

Debug
A and AAAA records found for this domain
t42.dyndns.org. 0 IN A 78.30.56.133
Challenge update failures for t42.dyndns.org in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/5056581164
acme: error code 403 "urn:ietf:params:acme:error:unauthorized": 78.30.56.133: Invalid response from http://t42.dyndns.org/ui/: "<!doctype html>\n<html lang=\"en\">\n<head>\n <meta charset=\"utf-8\">\n <meta http-equiv=\"Pragma\" content=\"no-cache\">\n <meta http-eq"
Debug
The IANA public suffix is the TLD of the Registered Domain
The TLD for t42.dyndns.org is: org
Debug
The current status.io status for Let's Encrypt
Operational

Submitted Nov 7 20:14:55 2022. Sat in queue for 3ms. Completed in 4s. Hide verbose information.