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Troubleshooting Network Connectivity

 
 

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Important Note

Before proceeding with troubleshooting, please check the Steam Server Status page to ensure the issue which you are encountering is not related to system-wide downtime. (If you encounter any timeout errors when attempting to access Steam sites, it is very likely that there is a system-wide issue and Steam will not be accessible until the issue is resolved)


Steam Connection Test

Please run the Steam Connection Test linked below to diagnose in-game connectivity issues. You must log in to Steam to run diagnostic tests - if you are encountering difficulty logging in to Steam you should skip this step. Run the Steam Connection Test

steam://support/?Issues=*&Tests=Ports

Note: If you do not receive a report from the Steam Connection Test, you may not have the latest version of the Steam client application.


Required Ports for Steam

Your network must be configured to allow Steam access to the following ports:

Steam Client

  • UDP 1200 (For the Friends service)
  • UDP 27000 to 27015 inclusive
  • TCP 27020 to 27050 inclusive

Dedicated Server

  • UDP 27015 and 27020 (Default HLDS, SRCDS and HLTV ports)
  • TCP 27015 (SRCDS Rcon port)

Note: Windows XP SP1 firewall users running Source Dedicated Server must open TCP Port 27015 for Rcon to work


Known issues with Internet Service Providers (ISP's)

There are several ISP's which interfere with Steam traffic:

  • Dutch Telecom (Steam traffic blocked)
  • ISPFree (Steam traffic blocked)
  • TalkTalk (bandwidth throttling reduces download speeds)
  • Bluewin (Firewall blocks Steam from provider side - must be disabled through provider's service portal)

Troubleshooting Network Connectivity Issues

Please follow the steps below for troubleshooting network connectivity issues within Steam:

Programs which interfere with Steam

http://support.steampowered.com/cgi-bin/steampowered.cfg/php/enduser/std_adp.php?p_faqid=451

Using a Firewall with Steam

http://support.steampowered.com/cgi-bin/steampowered.cfg/php/enduser/std_adp.php?p_faqid=234

Using a Router with Steam

http://support.steampowered.com/cgi-bin/steampowered.cfg/php/enduser/std_adp.php?p_faqid=246

Spyware, Adware, and Viruses Interfering with Steam

http://support.steampowered.com/cgi-bin/steampowered.cfg/php/enduser/std_adp.php?p_faqid=249

 
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