best solution for webserver redirection

[MK]

Hello all

I would like to know the best solution which is suitable for webserver 
redirection in following situation:

LAN --- WEBSERVER_ON_LAN ---------- NAT_OpenBSD_Apache -------- internet

OpenBSD NAT has only one public IP, and a domain name: for example - 
example.net

main webserver on OpenBSD is accessible under this domain name. But what to 
do when I want to allow access also for webserver on my LAN for users from 
internet under another domain: lan.example.net

I can not use redirection in PF because I need both web server on same 
standard port. I think that this situation is not solvable simply by PF 
because it does not do application level filtering.

I've found in Apache manual that I can use a redirect as Virtual Hostname. I 
set it up and it works. Whenever the request for lan.example.net is in a 
game the Apache inform the client's browser to use public IP of OpenBSD and 
non standard port which is redirected by PF to lan web server.
Is there any better solution for my case? For example it does not look very 
nice when you have an IP address in your URL address bar instead of domain 
name in your browser. I can not use additional public IP address.

Thank you for any hint

MK