ola wenas ¡
Pues si alguien me podria decir cuales son los puertos tcp y udp del steam? y weno ya de paso si alguien tmb sabe los del ventrilo se lo agradeceria , gracias 
Sakado de :
Which ports must be open in order to use Steam?
QuestionWhich ports must be open in order to use Steam?
Answer
Your network must be configured to allow Steam access to the following ports:
UDP 1200 (used for friends service)
UDP 27000 to 27015 inclusive
TCP 27020 to 27050 inclusive
Computers running Dedicated Servers need these ports open:
UDP: 27015 and 27020 (default HLDS, SRCDS and HLTV port)
TCP: 27015 (SRCDS Rcon port)
If your server uses a different hostport then you will need to adjust the above accordingly.
For help on port forwarding for your Router, please consult this excellent website: http://www.portforward.com.
For assistance with your Firewall you will need to go to the support site for your particular Firewall.
NOTE: Windows XP SP1 firewall does not require any specific configuration changes for Steam Clients to work, but for Source Dedicated Servers you must open TCP Port 27015 (or whichever port your server is using) for RCON to work!
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