FREE Comodo Personal Firewall - Secure your system against internal attacks such as Trojan viruses / malicious software and external attacks by hackers. With a user-friendly single click interface you can allow or block access to the Internet offering complete immunity to attacks and total protection of your personal information. Real time traffic monitoring enables you to react instantly to threats and identify bandwidth bottlenecks. Silent Security Technology means no needless alerts with out-of-the-box protection against hackers, Trojans and other unknown threats.