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Required Ports for Steam

Which ports do I need to open on my router or firewall for Steam?

To log into Steam and download content:
  • HTTP (TCP remote port 80) and HTTPS (443)
  • UDP remote port 27015--27030
  • TCP remote port 27015--27030
Steam Client
  • UDP remote port 27000--27100: Game traffic
  • UDP local port 27031 and 27036: In-Home Streaming
  • TCP local port 27036 and 27037: In-Home Streaming
  • UDP remote port 4380
Dedicated or Listen Servers
  • TCP local port 27015 (default): SRCDS Rcon port
  • UDP local port 27015 (default): gameplay traffic
Steamworks P2P Networking and Steam Voice Chat
  • UDP remote port 3478
  • UDP remote port 4379
  • UDP remote port 4380

Note:

Many university networks and proxies block required ports for Steam operation - please consult your network administrator to ensure the required ports are open if you are using a university network or a proxy. Ports required for Steam can not be re-mapped to HTTP or reconfigured to a custom port range.

Advanced

For generic Steam HTTP/HTTPS requests, your proxy should allow the following domains:

  • steampowered.com
  • steamcommunity.com
  • steamgames.com
  • steamusercontent.com
  • steamcontent.com
  • steamstatic.com
  • akamaihd.net

Most of the non-web traffic is usually UDP but can be TCP as well. For that, the IPs will all be from the Valve network (AS32590), and a list of those IP blocks can be found here:

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