@pwzapp I can't edit the topic of my original post (it says I have to wait 24 h for some reason), but the topic should of course be "CAN'T configure...". Some more information. The server has a...

I'm trying to forward a port to my server. I already have a couple of ports forwarded since a couple of years, but when I now try to add one more port I get the error message "The IP-address is...