Opening Ports or Adding Allowed Programs with SP2's Firewall

1.Click on Start / Run
2.Enter in firewall.cpl
3.Click on the Exceptions tab

Adding a Port for Internet Access:
1.Click on the Add Port button
2.Name it whatever you want
3.Enter in the ports you want to open

Adding a Program for Internet Access
1.Click on Add Program... button
2.A list of all installed programs will be displayed
3.Highlight the one you want to include for Internet access
4.Click on the OK button