Let's Debug

Test result for sonfoundry.duckdns.org using http-01

Error
sonfoundry.duckdns.org has an A (IPv4) record (152.67.223.236) but a request to this address over port 80 did not succeed. Your web server must have at least one working IPv4 or IPv6 address.
Get "http://sonfoundry.duckdns.org/.well-known/acme-challenge/letsdebug-test": dial tcp 152.67.223.236:80: connect: no route to host

Trace:
@0ms: Making a request to http://sonfoundry.duckdns.org/.well-known/acme-challenge/letsdebug-test (using initial IP 152.67.223.236)
@0ms: Dialing 152.67.223.236
@204ms: Experienced error: dial tcp 152.67.223.236:80: connect: no route to host
A test authorization for sonfoundry.duckdns.org to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
152.67.223.236: Fetching http://sonfoundry.duckdns.org/.well-known/acme-challenge/9unRJzEE37KnCga9NyIkQStJBUPdfN4KKeAlnOYyCrg: Error getting validation data

Submitted Dec 24 08:45:05 2023. Sat in queue for 5ms. Completed in 2s. Show verbose information.