Hi Tyrro,
Thank you for your reply.
As I wrote, I know 8080 is passed through the firewall correctly. I have some sites and applications running on an IIS server, and it uses port 80. If I route port 80 to the WP server, it works, so it's in the settings for WP somewhere, about port 8080. But I actually found a much better solution - or at least it is for me. Maybe other can use it too.
I have my servers running on a VMWare ESXi hypervisor, and i just added a small Debian server, and installed Squid3 on it - configured to be a reverse proxy. What is does, is route http-requests based on the actual url. This way I can route the WP stuff to my WP server, and everything else to the IIS server. Both can now run on port 80, and all is good. This way I can have any number of servers running on port 80, so I'm future proofed too.
/Jens.