Acces XP/IIS through Linux/apache

[peterg]

Hi¡K

I have a home network that connects to the Internet with an ADSL (dhcp).

The first computer is a Linux (Debian, 2.4.xx) with 2 network card (eth0„³ADSL; eth1(192.168.1.1)„³switch )
On Linux, i have an apache server.
The next computer (Windows XP pro (192.168.1.2) has an IIS webserver.

My problem is, how can i configure my network, so i can acces IIS from the Internet?
Can i configure the linux so i don¡¦t need to open an new port (only port 80)?

I do not have iptables , i have ipchange on my linux.
I have domainname www.domain.nu and domain.nu. In http.conf i use www.domain.nu as servername

Regards
PeterG