ZoneAlarm Free Firewall, the best inbound and outbound firewall available to consumers, stops threats others miss and is faster to install and run. ZoneAlarm Free makes it easy. Unlike other personal firewalls, ZoneAlarm protects automatically from the moment it`s installed - no programming required. ZoneAlarm Free can barricade your PC with complete and immediate port blocking. And, then runs in Stealth Mode to make your PC invisible on the Internet - if you can`t be seen, you can`t be attacked.