I had haproxy configured to forward ports 80, 443 to multiple servers based on the hostname. it was working great. then, I enabled Upnp, and it completely ruined the haproxy setup. None of the sites were working in that it would just give cert errors and such. The listen address are 0.0.0.0:80 etc.
Once disabling Upnp, it all works again as expected. I'm just curious what is the explanation. Thank you.