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 port 80) and HTTPS (443)
- UDP 27015 through 27030
- TCP 27015 through 27030
Steam Client
- UDP 27000 to 27015 inclusive (Game client traffic)
- UDP 27015 to 27030 inclusive (Typically Matchmaking and HLTV)
- UDP 27031 and 27036 (incoming, for In-Home Streaming)
- TCP 27036 and 27037 (incoming, for In-Home Streaming)
- UDP 4380
Dedicated or Listen Servers
- TCP 27015 (SRCDS Rcon port)
Steamworks P2P Networking and Steam Voice Chat
- UDP 3478 (Outbound)
- UDP 4379 (Outbound)
- UDP 4380 (Outbound)
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:
