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 control over security settings.
This free version is for non-commercial use only.