ALPN Passthrough (2 tiered Traefik)

Traefik Traefik v2
1

I want to use Traefik-v2 as TCP Proxy pointing to another Traefik-v2 configured HTTP mode with LetsEncrypt, but it's too smart and block ALPN.
Setup:

image
image1686×1278 164 KB

All looks good, but when ACME sends H1 response, TCP Proxy blocks it with

time="2024-08-15T06:39:40Z" level=debug msg="TLS: no certificate for TLSALPN challenge: <FQDN>"
time="2024-08-15T06:39:46Z" level=debug msg="TLS: no certificate for TLSALPN challenge: <FQDN>"

Can anyone please advise, if it's possible to pass ALPN challenges in the TCP mode?

2

There reason why I'm using this setup - there is complicated chain of tunnels between server A and B, so I want to land all traffic to server01 and route it further.

3

Looks like it's should be resolved after this will be merged

1 Like