How to change the SourceTV port in CS:S
Type tv_port 27021 in the server console so SourceTV listens on port 27021 instead of 27020.
tv_port
Sets the network port SourceTV listens on.
tv_port <port> Examples
tv_port 27021 Use another port.
Arguments
portRequired- UDP port.
What it does
The default is 27020. Change it when running several servers on one machine.
The game's own description: Host SourceTV port
Run it on your server
On a SLASHPLAY server, type it in the Console tab of the server page; the reply shows right under it. A value set there lasts until the server restarts. To keep it, add the line to cstrike/cfg/server.cfg. New to this? Start a CS:S server first.
Your own
CS:S server.
From $0.03 an hour, only while it runs. New accounts get 6 free tokens.