USG210 route a HTTP request to a particular server

AFAIK....
IMVHO You should need a VirtualHost or a Reverse proxy, but I don't know if USGs devices can achieve that.

Hello PeterHer as mentioned by mMontana above as a good suggestion , just use a reverse-proxy on your host that handles the WAN(s) and their interfaces for HTTPS/HTTP requests to a mythical 'server02"

FWIW we use NGINX .. there is an abundance {plenty (tonnes!)} of wonderful documentation, and beginner step-by-step guides, odysee video etc  there on those interwebs.

The Simple Way 

1.  on the USG appliance, set up the usual Security Policies  and NAT fwds for requests on 80 | 443 to a set server on your setup (server01).
2. then with NGINX ( similar) on server01, (with certs etc etc) , configure the reverse roxy for the https request to be redirected to the preferred 'server02" (physical or VM etc) - again refer to the  doc.

This way you can simply have one https/http  server that handles for everything ... it can be made very exostic as well .. I'm confident many,many forum members will use this method.

The (bloody) Hard Way 

Instead ... another way (the awkward hard way) is to do it all in the USG appliance for settmg host/domain names and requesting non HTTP (80)/ HTTPS (443) to be made on another port then using USG NAT virt and (Sec Pol etc) to route them to a particular server(s) on your LANS s...  ( :-1 hard work basically and not esay to use externally)...

• such that each https | https reqs for the 'server02) would reuire a specific port.......
• example"  https://peterhers.setup.org:65333/blahblah ..... =      .

 
Apache, NGINX and their ilk is the way to go.... 

HTH
Warwick
Hong Kong