Redirect/Forward to LAN IP

Hi!

Can i redirect or forward requests to a local server (LAN IP) while keeping the original host header? I have one web-server behind one WAN IP but now I want to set up a second web-server. I then want both sub1.domain.com and sub2.domain.com pointing to one WAN IP -> NAT to local server (192.168.1.X) and then redirect or forward requests for sub2.domain.com to second local server (192.168.1.Y). The sites are secured by SSL, so I need to keep the original host header.

Is this possible? I know that I can use TMG for reverse proxy but it is not optimal for me.

Thanks,
Hans Marius