HLDS problem-friends cannot see

[phoenixankit]

Also, what is the difference between -ip xx.xx.xx.xx and +ip xx.xx.xx.xx
and do I also have to add +port 27015 or -port 27015

I deleted the previous forwarded ports and added these
UDP 27000 to 27015 (Gameport)
UDP 27020
TCP 27030 to 27039
TCP 27015 (SRCDS Rcon port)