USe ZoneAlarm to 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.

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