Let's Debug

Test result for band.snu.ac.kr using http-01

A test authorization for band.snu.ac.kr to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
147.46.15.17: Fetching http://band.snu.ac.kr/.well-known/acme-challenge/ZWJC1MyXHAs24c5OKWx0ASSVxWR0GYvX9bwFzlxIPe8: Redirect loop detected
Debug
Requests made to the domain
Request to: band.snu.ac.kr/147.46.15.17, Result: [Address=147.46.15.17,Address Type=IPv4,Server=nginx/1.18.0 (Ubuntu),HTTP Status=302,Number of Redirects=2,Final HTTP Status=404], Issue:
Trace:
@0ms: Making a request to http://band.snu.ac.kr/.well-known/acme-challenge/letsdebug-test (using initial IP 147.46.15.17)
@0ms: Dialing 147.46.15.17
@661ms: Server response: HTTP 302 Found
@661ms: Received redirect to http://band.snu.ac.kr/00867224609/.well-known/acme-challenge/letsdebug-test
@661ms: Dialing 147.46.15.17
@1332ms: Server response: HTTP 302 Found
@1332ms: Received redirect to http://band.snu.ac.kr/.well-known/acme-challenge/letsdebug-test
@1332ms: Dialing 147.46.15.17
@2030ms: Server response: HTTP 404 Not Found

Debug
A and AAAA records found for this domain
band.snu.ac.kr. 0 IN A 147.46.15.17
Challenge update failures for band.snu.ac.kr in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/16580442474
acme: error code 400 "urn:ietf:params:acme:error:connection": 147.46.15.17: Fetching http://band.snu.ac.kr/.well-known/acme-challenge/ZWJC1MyXHAs24c5OKWx0ASSVxWR0GYvX9bwFzlxIPe8: Redirect loop detected
Debug
The IANA public suffix is the TLD of the Registered Domain
The TLD for band.snu.ac.kr is: ac.kr
Debug
The current status.io status for Let's Encrypt
Operational

Submitted May 17 02:23:52 2024. Sat in queue for 2ms. Completed in 33s. Hide verbose information.