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Question
I have Steam installed but I can´t connect
Answer
Problem:
I am recieving the error: Could not connect to the Steam Network or Warning: Steam is having trouble connecting to the servers
NOTE: If Steam is running and you are receiving a " Game Unavailable" message please review THIS faq.
General Fixes:
Assuming that your connection to the Internet is working with other applications ( browser, e-mail, etc.), connection problems with Steam can occur for a number of reasons. The most common ones are outlined below.
Your Internet Connection
Check the stability and reliability of your Internet connection. An unstable connection can cause Steam to download improperly, or your attempt to connect to a server might time out.
There are many online tools that help you to check for problems with your connection, here are two of the more popular:
http://www.dslreports.com/tools
http://www.speedguide.net/analyzer.php
If you suspect that you are having a problem related to your Internet Connection, please contact your ISP.
P2P, FTP and Web Server Applications
Make sure that you´re not running P2P programs like Kazaa, LimeWire, BitTorrent, or Exeem in the background. These programs can consume a large portion of your bandwidth. The same is true for FTP and Webserver applications.
Security and Firewall and Anti-Virus Software
If you´re using security or firewall or anti-virus software, train them to recognize Steam.exe and all instances of HL.exe and HL2.exe as trusted programs. Consult your program manuals for how to do this.
Typically, if you have a connection problem immediately after a Steam update it is being caused by your firewall.
The best solution is to go to the firewall permissions and remove all references to Steam.exe, HL.exe and HL2.exe and let them be relearned again. Just because there are existing permissions does NOT mean they are correct permissions!
You should also only be running one firewall at a time. Never run two or more firewall programs, they can conflict with each other and cause many different connection problems.
Firewalls and Routers
If your computer is behind a router with a firewall, you´ll need to open the ports that Steam uses to connect to the Internet. Most embedded firewalls require you to open ports manually ( they don´t learn automatically). Routers without firewalls rarely need to have ports opened for game client ( but usually do for game servers).
If your configuration software requires port numbers, please use the following:
UDP 1200 ( used for friends service)
UDP 27000 to 27015 inclusive
TCP 27020 to 27039 inclusive
TCP 27040 and 27041 only for CyberCafe Owners
Computers running Dedicated Servers need these ports open:
UDP: 27015 and 27020 ( default HLDS, SRCDS and HLTV port)
TCP: 27015 ( SRCDS Rcon port)
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. Windows XP SP1 firewall does not require any specific configuration changes for Steam to work but XP SP2 firewall does.
Router Problems
Routers can cause connectivity problems. Linksys routers and Wireless routers especially can cause this. Dual WAN Routers are not compatible with Steam. If you have a stand-alone router and you are having connection problems, you can always bypass the router and plug your computer directly into your modem to see if the router is the problem.
Viruses, spyware and malware, netlimiting, anonymous IP masking programs
Connection problems can also arise if your system is infected with a virus or spyware. Programs like Cybersitter, Netlimiter, X-Fire and Stegnos Anonymous Internet can also interfere with normal Steam operations.
There are many free applications to help remove spyware. Here are some links we have found to be useful:
http://www.computercops.biz
http://www.io.com/~cwagner/spyware.html
http://www.dslreports.com/faq/spyware
Steam Related fixes
If you have ruled out the external problems we´ve outlined above, you can also do the following:
If Steam related files became corrupted, they can interfere with Steam’s ability to connect, you may have to delete or re-install these files.
Steam and HL related files that can get corrupted:
ClientRegistry.blob file,
Steam.exe and Steam.dll files
Steam´s GCF ( game cache) files,
any custom game content you may have installed.
It is very easy to verify that your Game Cache files are good, you can verify them using the links on this FAQ:
How can I verify that my GCF Cache files are good?
Make sure that you´re not running Steam.exe and HL.exe under compatibility mode in Windows XP.
If you have two network cards installed, disable all network connections except the one associated with your internet connection. Also, disable QoS, uPNP and Wireless Zero services if your connection has these enabled. Only TCP/IP should be enabled as a service in your network properties.
Internet Connection Sharing ( ICS) is not compatible with Steam. You will not be able to use Steam on a computer if the only network connection is through ICS.
ISP providers that use transparent proxy caching methods or that mask your IP address can also cause Steam to fail to connect.
NOTE: Many Colleges, Universities, Schools and Large Corporations are now actively blocking ports to prevent virus, trojan and Internet worm problems as well as to prevent misuse of their networks.
If you are having problems and you are on one of these complex networks that are intentionally blocking ports required for Steam to work then you may not be able to connect to Steam and play.
About all you can do is to take the Steam required port list to the network administrators and ask them if those ports are blocked.
Many of these networks will unforunately also mask your IP address and so may prevent Steam from working. This is a different problem from port blocking and is related to Proxy and / or NAT translating twice. For example, there might be a router doing NAT in your Dorm that then feeds another NAT translating router that services one part of the Campus.
If this is happening then you probably won´t be able to run Steam over the Campus network.
If all else fails, try uninstalling Steam ( use the add/remove option in the control panel) and re-install a fresh copy.
Steam Network Status
Finally, if the Steam Network is down or too busy you may not be able to connect to the Steam Network. You can visit the Steam Status Page and see if there is something is going on. If the last update for that page is more then 20 or 30 minutes behind, that is a good indicator of a problem.
Please also check to see if there are other players having the same problem on the Steampowered Forums.
If the Network is down, you will just need to be patient and wait until the problem gets cleared.
If everything else seems to be ok and no one else is reporting this problem then you can try exiting from Steam and deleting your ClientRegistry.blob file which is typically located in the following directory:
C:\Program Files\Valve\Steam\Clientregistry.blob
