Comodo Internet Security, Comodo’s award-winning free security suite, offers prevention-based, Default Deny Protection (DDP) technology to prevent malware in your PC. Conventional security suites ignore prevention, focusing only on the eventual detection of viruses. Basically, this means that it will allow all applications to access your PC resources by default as long as the application is not on your security software’s blacklist of already known malware.
Comodo Internet Security includes an extensive white-list of safe executables called the 'Comodo Safe-List Database'. This database checks the integrity of every file and application asking for access to your PC. In addition, this software can alert you of all potentially damaging programs even before they are installed. This is a ground-breaking method of protecting your PC. Traditionally firewalls only detect harmful applications from a blacklist of known malware - often-missing new forms of malware that are being created and launched daily.