Firewalls. GameSpy Arcade is 100% reliant on your Internet connection being fully functional. The same holds true for any games that you want to play online against other people.

Firewalls: Firewall Reviews, Best Firewall
ConsumerSearch.com reviews the reviews of firewalls (firewall software and hardware firewalls), as well as hundreds of other products. The site identifies which firewalls reviewers

RealSystem Firewall Support
Firewall Support. Firewalls and the RealSystem . Firewalls create barriers in order to prevent unauthorized access to a network. Think of the Internet as a series of hallways.