Sudden ACME error

Traefik Traefik v1
,
1

Hello,

I just upgraded to 1.7.18 and all of a sudden I get ssl certificates errors:

[INFO] [www.my.domain, identity.my.domain, api.my.domain, portainer.my.domain, proxy.my.domain] acme: Obtaining bundled SAN certificate"

[INFO] [api.my.domain] AuthURL: https://acme-v02.api.letsencrypt.org/acme/authz-v3/58xx"
[INFO] [api.my.domain] acme: use tls-alpn-01 solver"
[INFO] [api.my.domain] acme: Trying to solve TLS-ALPN-01"
[INFO] Unable to deactivate the authorization: https://acme-v02.api.letsencrypt.org/acme/authz-v3/58xx"

 acme: Error -> One or more domains had a problem: url: \n[api.my.domain] acme: error: 400 :: urn:ietf:params:acme:error:connection :: Timeout during connect (likely firewall problem),

But all containers are up, and are accessible via https.
I can open them but I get the Traefik dev ssl certificate.
The entrypoints are served only via IPV4.

This is my traefik.toml:

defaultEntryPoints = ["http", "https"]

[entryPoints]
	[entryPoints.http]
       address = ":80"
       [entryPoints.http.redirect]
        entryPoint = "https"
	[entryPoints.https]
       address = ":443"
       [entryPoints.https.tls]
	[entryPoints.traefik]
       address = ":8080"
		[entryPoints.traefik.auth]
        [entryPoints.traefik.auth.basic]
       users:...

[acme]
  email="my@gmail.com"
  storage="acme.json"
  caServer = "https://acme-v02.api.letsencrypt.org/directory"
  entryPoint="https"
  acmeLogging=true
  onHostRule=false
  [acme.tlsChallenge]
  [[acme.domains]]
      main = "www.my.domain"
      sans = ["identity.my.domain", "api.my.domain", "portainer.my.domain", "proxy.my.domain"]
2

Is there any configuration setting that changed between the two versions, 1.7.14 and 1.17.18?
And I should set it now, in order to make acme work again?

3

So, it had nothing to do with Let's Encrypt or Traefik.
Some firewall rules were added without my knowledge, that prevented Let's Encrypt from connecting to port 443.. :frowning: