HTTPS redirection and Haproxy little problem

[execcr]

Hello,
i have a problem with haproxy https redirection.
I have this configuration:
2 frontend on haproxy:
1 for http port 80 with 2 rules: the first is for letsencrypt certificate folder ( Path starts with: no /.well-known/acme-challenge/ redirect to certificate challenge forlder) the second redirect all the other request Path starts with: yes /.well-known/acme-challenge/ to a backend with a dummy server and a backend passthru rule redirect scheme https code 301
1 for https with 2 acl rules for 2 backend server.

The aim is to redirect all http://server1.domain.com and http://server2.domain.com to HTTPS.
The problem is that: if i wrote http://server1.domain.com on chrome it works the first time, i get redirect to https and i get the login page of my webservice. Then i write my credential but the login page then load the HTTP url and not the HTTPS one throwing a 503 error page. I didn't have this problem when i used apache2 as reverse proxy for this 2 servers.
Any hint?

[doktornotor]

Try something like

http-request set-header X-Forwarded-Port %[dst_port]
http-request add-header X-Forwarded-Proto https if { ssl_fc }

on the backend.

Might also need

acl secure dst_port eq 443
rsprep ^Set-Cookie:\ (.*) Set-Cookie:\ \1;\ Secure if secure

on the frontend.

[execcr]

Thank you for the hint.
i've configured haproxy via webgui, is a problem to edit directly the conf files to add that lines?

[doktornotor]

Do NOT edit the config files, use the GUI.