Open a web browser like internet explorer or Netscape. Enter the ip address of your router in the address bar of your browser. In the picture above the address bar has http://www.google.com in it. Just replace all of that with the ip address of your router. By default the ip address should be set to 192.168.1.1.

Click the Expert Mode button near the left of the page.

Click the Configure button near the left of the page.

Click the NAT button near the left of the page.

Click the Define Custom Service button near the bottom of the page.

Click the Next button near the bottom of the page.

We will list a series of lines here that will show you exactly how to forward the ports you need to forward. Steam Client requires you to forward the 4380,27000-27050 ports. Go ahead and enter the settings shown above into the Port Range menu and then click Next then Close.

You should see another page of settings that need to be entered into one of the blank lines on your routers Port Range page. Go ahead and enter those settings and then click Next then Close.

You should see another page of settings that need to be entered into one of the blank lines on your routers Port Range page. Go ahead and enter those settings and then click Next then Close.

And that is it! You are done!