Under default settings, unknown and untrusted files are run in a virtual environment (sandbox) on your local machine so they cannot modify or affect data on your 'real' system. Comodo Firewall also features cloud based scanning and behavior analysis of unrecognized files - making Comodo Firewall unbeatable at detecting zero-day attacks. With a single click you can allow or block access to the internet, offering complete immunity to attacks and total protection of your personal information. Comodo's Firewall uses Default Deny Protection to prevent threats from occurring, rather than just detecting them when it's already too late. If it isn’t then Comodo Free Firewall will alert you that a possibly malicious file is attempting to access your PC.Comodo's free Firewall is your first layer of defense against viruses, worms, trojans, hackers and other internet threats. It works by using a cross reference system to ensure that whenever unknown software has been introduced to your system, Comodo Free Firewall will cross-reference it with a white-list of over 15 million files and apps to see if it is legitimate. It uses something called default deny protection (DDP) to prevent any threats from entering, and affecting your system. This free firewall protects your computer from all manner of external threats in an efficient and effective way.

Secures all connections when you are online.

Fast and hassle-free online experience.Not only is it pleasing on the eyes, it also provides enhanced protection via a constantly updated cloud database to always keep your system as safe as possible. The interface is modern, sleek and intuitive and easy to navigate. Comodo Free Firewall is a superb replacement for Windows’ default utility.

Comodo personal firewall download