i tried connecting blood multiplayer over inernet by connectip console command, didn't work as should have been. my firewall reported connections comming in to windows operating system instead.

edit: also port should be changable.
edit2: now i know i should have used console command spawnipserver.
edit3: didn't help, client seems not connect even when it's clearly networkwise connected.
edit4: finally got it running, first you needed to startgame, then spawnipserver then connectip