Reverse Proxy - Hide port in response

Hello everybody,

I am trying to use haproxy to redirect traffic based on the url to different traefic instances in docker containers.

The goal is to overcome shortcomings of traefic in handling multiple dns challenge configurations within one instance.

My problem:

• Redirect to ATraefik and BTraefik works, as well as the letsencryptsetup in both and the services running behind ATraefik and BTraefik.
• But the running services have the Port in the URLs e.g.
  • https://Service1.ADomain.com:444
  • https://Service1.BDomain.com:445

The goal:

• I would like to have the services behind ATraefik and BTraefik respond without the Ports in the URL, that is:
  • https://Service1.ADomain.com
  • https://Service1.BDomain.com

Thank you very much for any help with this!

Configurations and Setup:

The setup looks like this:

                             +----------+
                             |          |
+----------------------+     | ATraefik |
|                      |     |          |
|          ADomain.com +<--->+----------+
|haproxy               |
|          BDomain.com +<--->+----------+
|                      |     |          |
+----------------------+     | BTraefik |
                             |          |
                             +----------+

frontend https_in
    bind *:443

    acl host_a hdr(host) -i ADomain.com
    acl host_b hdr(host) -i BDomain.com   

    use_backend a_websecure if host_a
    use_backend b_websecure if host_b

backend a_websecure
    server a_traeifk a_traefik:444

backend b_websecure
    server b_traeifk b_traefik:445

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