I have a number of webserver behind my OPNSense firewall, is it possible to route the traffic to the correct server based on the URL that is coming in ?, without having to have them all on different ports ??
This is exactly what HAProxy is for.
https://docs.opnsense.org/manual/how-tos/haproxy.html
Bingo, and perfect, thanks for the pointer.
Now to go and read up on how it works.