ZoneAlarm is an easy-to-use firewall that blocks hackers and other unknown threats.

* Intrusion Blocking systematically identifies hackers and blocks access attempts.

* Stealth Mode automatically makes your computer invisible to anyone on the Internet.

* Automatic Program Configuration provides safety and simplicity by automatically configuring programs. Automatically decides whether to allow or deny Internet access to individual programs.

* Expert Controls give savvy users precise controlover security settings.

This free version is for non-commercial use only.