Creating Trust Online


Comodo's award winning firewall protects you from virus, malware, spyware and malicious websites.

CNET Editor's Choice - Award Winning Firewall to find and protect your PC from threats

  • Prevents all viruses and malware
  • Comodo Antivirus provides reliable protection for your day-to-day activities
  • Fast cloud-based scanning
  • Improves performance and efficiency
  • Detects suspicious hidden files
  • Protects all your devices

One step to gain peace of mind

Upgrade to our full security suite Internet Security Pro which includes Firewall, Antivirus, instant live support and more!


Comodo Firewall Pro brings a revolutionary change to internet security with Default Deny Protection (DDP?) technology. The security tool provides the very best protection against online threats like malware, spyware, trojans and hackers.

System Requirements

  • Windows 10/ Windows 8 / Windows 7 / Windows Vista / Windows XP SP2
  • 152 MB RAM / 400 MB Hard Disk Space
  • Release Date: December 19, 2012

Conventional security programs which determine if a file should be allowed access to the computer based on offline malware definitions. If the definition misses some entries or doesn't have updated malware list, virus and malicious codes will easily gain access to your PC. DDP works in the cloud to get up-to-date definitions plus a list of files from trusted vendors. The firewall refers to a list of over 2 million PC-friendly applications before authorizing access to a request. Programs that cannot be verified as safe are run in a secure isolated area called the sandbox, providing perfect protection because you are even protected from threats that have not yet been identified

Unique Features of Comodo Firewall

  • Easy-to-use setup and configuration ? Perfect for new users
  • Quick user behaviour analysis allows personalized protection
  • Visually impressive, user-friendly graphical interface
  • Open configuration options allow pro users to tweak settings
  • DDP-based security for maximum protection and updated alerts

The most prominent step towards a secure online experience is using a quality firewall program. Comodo Firewall is free and has access to a safe list of PC-friendly applications, an integral component of Default Deny Protection™.

Need time to consider a full upgrade? Get free firewall protection first!



Known PC-friendly applications are executed and malicious files are prevented access

Prevents virus, trojans and malware from accessing your computer before any damage occurs

Sandbox is a virtual operating environment where programs that have not been verified as safe can be executed. This protects you even against threats that have not been identified yet.

Based on individual user preference, automatic behaviour analysis allows frequently accessed files and blocks unidentified programs with managed alerts.

Cloud-based behaviour analysis system identifies zero-day malware immediately.

Cloud-based whitelisting of trusted programs detects PC-friendly files and trusted vendors.

Scheduled scans, alerts and virus warnings are suppressed in game mode to allow hassle free gaming experience.

Application control allows users to completely lock down their PC and provide access to verified programs.

Categorized warnings specify the type and level of threat from each source.

Simple, quick and efficient. Comodo firewall will scan after installation and automatically add all existing programs to the safe list with a single click.

Access current security settings easily with an at-a-glance snapshot.

Quick navigation made easy with simple, efficient and user-friendly interface

Point-and-click setup to access pre-set security level settings and make changes easily.

Get exclusive access to Comodo safe-list containing over 2 million known PC-friendly programs.

Comodo Firewall monitors your activities to create 'allow rules' and identifies trusted programs to minimize alerts in training mode.

Frequently Asked Questions

Firewall protection is a data packet filtering tool which secures your PC by scanning incoming and outgoing communication to barricade malware entry.


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