Unable to get certificate in DuckDNS

Third party integrations
1

Just installed and configured DuckDNS according to the documentation and some Videos (I’m a bloddy beginner with HA), but the ACME handshake does not work:

[19:43:08] INFO: Starting DuckDNS...
[19:43:08] WARNING:
[19:43:08] INFO: Renew certificate for domains: mydomain.duckdns. org and aliases:
# INFO: Using main config file /data/workdir/config
Processing mydomain.duckdns. org
+ Signing domains...
+ Generating private key...
+ Generating signing request...
+ Requesting new certificate order from CA...
+ Received 1 authorizations URLs from the CA
+ Handling authorization for mydomain.duckdns. org
+ 1 pending challenge(s)
+ Processing each challenge individually...
Processing domain: mydomain.duckdns. org
ERROR: deploy_challenge hook returned with non-zero exit code

Portforwarding on port 80 and 443 is in place and confirmed to be open and forwarded to HA.

Any ideas or hints, where I can find more information or how to debug this?

Thanks, William

2

What is the public IP of your router?

If you can not get that, then try a traceroute to Googles DNS server (tracert 8.8.8.8 in Windows Command prompt).

3

Probably a bad timing and nothing you can control; duckdns.org are having issues right now. It seems like their website returns error 404 and all dns are broken currently. See DuckDNS error 404 since 31/08/2025 · Issue #4144 · home-assistant/addons · GitHub (issue is marked closed but many people are commenting about still being affected).