Firewall

Comodo's FREE Firewall keeps viruses, malware, worms, Trojans, hackers and other threats from accessing and harming your computer.

Using an exclusive white-list of over 15 million known PC-safe files, Comodo Firewall blocks unknown viruses before they can even install.

Keep hackers and data thieves out of your computer with ZoneAlarm, the PC firewall that protects against Internet-borne threats like worms, Trojan horses, and spyware. ZoneAlarm provides the basic protection individuals need to secure their PC and keep their valuable information private.