Buckwheat, thanks. It's beginning to get clearer for me now, but I still have a few questions looking at the code.
If I 'read' it correctly, the code says: "If you call on mydomain.eu.org at the main server (host_ip?) at port 80, then proxy to new/virtual server (proxy_IP?)"?
If correct, I assume I should do something like this for other ports like for instance port 21, 25 and 110?
Which files/maps should the perms be set to 744?