Traefik suddenly unable to generate a certificate

Traefik Traefik v3 (latest)
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1

Hey…

I’ve self-hosted a server and currently running adguard on it. Using traefik to get DoT access for the same.

All this while, traefik was able to generate a certificate for my domain. But earlier today, out of the blue, I noticed the adblock dns wasn’t working and see this in the traefik Logs:

ERR ``github.com/traefik/traefik/v3/pkg/provider/acme/provider.go:503`` > Unable to obtain ACME certificate for domains error="unable to generate a certificate for the domains [my.domain]: error: one or more domains had a problem:\n[my.domain] invalid authorization: acme: error: 400 :: urn:ietf:params:acme:error:tls :: my.ip.address: remote error: tls: no application protocol\n"

Would appreciate any help with this.

Sorry if I left out any relevant info as I’m pretty new to traefik

2

LetsEncrypt API sometimes changes, are you running a current version of Traefik?

3

This was my mistake. I figured it out.

I was using traefik specifically for the DoT with adguard. So port 443 wasn’t enabled in order for traefik to communicate via tls.

Enabled that and all working as it should.