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Comodo Internet Security

Comodo Internet Security

Version 7.0

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Advanced Settings > Security Settings > Firewall Settings
  • Introduction To Comodo Internet Security
    • Special Features
    • System Requirements
    • Installation
      • CIS Premium – Installation
      • CIS Pro - Installation And Activation
      • CIS Complete - Installation And Activation
      • Activating CIS Pro/Complete Services After Installation
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    • Starting Comodo Internet Security
    • The Main Interface
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      • The Tasks Interface
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      • The System Tray Icon
    • Understanding Security Alerts
  • General Tasks – Introduction
    • Scan And Clean Your Computer
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      • Run A Custom Scan
        • Scan A Folder
        • Scan A File
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    • Instantly Scan Files And Folders
    • Processing Infected Files
    • Manage Virus Database And Program Updates
    • Manage Quarantined Items
    • View CIS Logs
      • Antivirus Logs
        • Filtering Antivirus Logs
      • Firewall Logs
        • Filtering Firewall Logs
      • Defense+ Logs
        • Filtering Defense+ Logs
      • Website Filtering Logs
        • Filtering Website Filtering Logs
      • Alerts Logs
        • Filtering Alerts Displayed Logs
      • Tasks
        • Filtering Tasks Launched Logs
      • Configuration Changes
        • Filtering Configuration Changes Logs
    • Get Live Support
    • View Active Internet Connections
    • View Active Process List
  • Firewall Tasks – Introduction
    • Allow Or Block Internet Access To Applications Selectively
    • Stealth Your Computer Ports
    • Manage Network Connections
    • Stop All Network Activities
    • Advanced Firewall Settings
  • Sandbox Tasks – Introduction
    • The Virtual Desktop
      • Starting The Virtual Desktop
      • The Main Interface
      • Running Browsers Inside The Virtual Desktop
      • Opening Files And Running Applications Inside The Virtual Desktop
      • Configuring The Virtual Desktop
      • Closing The Virtual Desktop
    • Run An Application In The Sandbox
    • Configure The Sandbox
    • Reset The Sandbox
  • Advanced Tasks – Introduction
    • Create A Rescue Disk
      • Downloading And Burning Comodo Rescue Disk
    • Remove Deeply Hidden Malware
    • Submit Files
    • Identify And Kill Unsafe Running Processes
    • Manage CIS Tasks
  • Advanced Settings
    • General Settings
      • Customize User Interface
      • Configure Program And Virus Database Updates
      • Log Settings
      • Manage CIS Configurations
        • Comodo Preset Configurations
        • Importing/Exporting And Managing Personal Configurations
    • Security Settings
      • Antivirus Settings
        • Real-time Scanner Settings
        • Scan Profiles
        • Exclusions
      • Defense+ Settings
        • HIPS Behavior Settings
        • Active HIPS Rules
        • HIPS Rule Sets
        • Protected Objects
          • Protected Files
          • Blocked Files
          • Protected Registry Keys
          • Protected COM Interfaces
          • Protected Data Folders
        • Behavior Blocker
          • The Sandbox - An Overview
            • Unknown Files - The Auto - Sandboxing And Scanning Processes
        • Configure The Sandbox
      • Firewall Settings
        • Firewall Behavior Settings
        • Application Rules
        • Global Rules
        • Firewall Rule Sets
        • Network Zones
          • Network Zones
          • Blocked Zones
        • Port Sets
        • Website Filtering
          • Creating And Modifying Website Filtering Rules
          • Defining And Modifying Website Categories
      • Manage File Rating
        • File Rating Settings
        • Trusted Files
        • Unrecognized Files
        • Submitted Files
        • Trusted Vendors List
  • Comodo GeekBuddy
    • Overview Of Services
    • Activation Of Service
    • Launching The Client And Using The Service
    • Accepting Remote Desktop Requests
    • Chat History
    • Using Issue Tracker
    • Uninstalling Comodo GeekBuddy
  • TrustConnect Overview
    • Microsoft Windows - Configuration And Connection
    • Mac OS X - Configuration And Connection
    • Linux / Open VPN - Configuration And Connection
    • Apple IPhone / IPod Touch - Configuration And Connection
    • Android Devices - Configuration And Connection
    • Windows Mobile Devices - Configuration And Connection
    • TrustConnect FAQ
  • Comodo Dragon
  • Comodo BackUp
  • Appendix 1 CIS How To... Tutorials
    • Enable / Disable Security Components Easily
    • Set Up The Firewall For Maximum Security And Usability
    • Block Internet Access While Allowing Local Area Network (LAN) Access
    • Block/allow Websites Selectively To Users Of Your Computer
    • Set Up The HIPS For Maximum Security And Usability
    • Set Up The Behavior Blocker For Maximum Security And Usability
    • Password Protect Your CIS Settings
    • Reset Forgotten Password (Advanced)
    • Run An Instant Antivirus Scan On Selected Items
    • Create An Antivirus Scanning Schedule
    • Run Untrusted Programs Inside Sandbox
    • Run Browsers Inside Sandbox
    • Run Untrusted Programs Inside Virtual Desktop
    • Run Browsers Inside The Virtual Desktop
    • Restore Incorrectly Quarantined Item(s)
    • Submit Quarantined Items To Comodo For Analysis
    • Enable File Sharing Applications Like BitTorrent And Emule
    • Block Any Downloads Of A Specific File Type
    • Disable Behavior Blocker And Auto-Sandboxing On A Per-application Basis
    • Enabling Full Virtualization For Auto-Sandboxed Applications
    • Switch Between Complete CIS Suite And Individual Components (just AV Or FW)
    • Switch Off Automatic Antivirus And Software Updates
    • Suppress CIS Alerts Temporarily While Playing Games
    • Renewal Or Upgrading Your License
    • How To Use CIS Protocol Handlers
  • Appendix 2 - Comodo Secure DNS Service
    • Router - Manually Enabling Or Disabling Comodo Secure DNS Service
    • Windows XP - Manually Enabling Or Disabling Comodo Secure DNS Service
    • Windows 7 / Vista - Manually Enabling Or Disabling Comodo Secure DNS Service
  • Appendix 3 - Glossary Of Terms
  • Appendix 4 - CIS Versions
  • About Comodo Security Solutions

Firewall Settings


The Firewall component of Comodo Internet Security offers the highest levels of security against inbound and outbound threats. It checks that all network traffic in and out of your computer is legitimate, it stealths your computer's ports against hackers and it blocks malicious software from transmitting your confidential data over the Internet. Comodo Firewall also makes it easy for you to specify exactly which applications are allowed to connect to the Internet and immediately warns you when there is suspicious activity. Also you can configure rules to allow or block access to specific websites for particular users of your computer.




The 'Firewall Settings' area has several sub-sections that allow you to configure overall behavior; configure network zones and portsets and (for advanced users) to configure and deploy traffic filtering rules on an application specific and global basis.


Click the following links to jump to the section you need help with:

  • Firewall Behavior Settings – Configure settings that govern the overall behavior of the firewall component.
  • Application Rules – View, create and modify rules that determine the network access privileges of individual applications or specific types of application
  • Global Rules – View, create and modify rules that apply to all traffic flowing in and out of your computer.
  • Rule Sets – Predefined collections of firewall rules that can be applied, out-of-the-box, to Internet capable applications such as browsers, email clients and FTP clients.
  • Network Zones – A network zone is a named grouping of one or more IP addresses. Once created, you can specify a zone as the target of firewall rule.
  • Portsets - Predefined groups of regularly used ports that can used and reused when creating traffic filtering rules.
  • Website Filtering – Create website filtering rules which let you determine which sites certain users can or cannot access.


    Background note on rules: Both application rules and global rules are consulted when the firewall is determining whether or not to allow or block a connection attempt.
    • For Outgoing connection attempts, the application rules are consulted first then the global rules.
    • For Incoming connection attempts, the global rules are consulted first then application specific rules.


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