LetsEncrypt renewal failure with error 400 ‘Timeout during connect’

I encountered this issue when using the Traefik Docker container. LetsEncrypt certificate renewal using the ACME protocol failed. In this case, I had shut down inbound traffic at my edge to port 80. ACME needs this if you’re utilizing the HTTP-01 challenge (the most common). Easy solution… open TCP 80 at your edge and ensure that traffic can reach your Docker host/container.

Leave a comment

Close Bitnami banner