Available on Windows

The most popular firewall on Windows

Comodo Internet Security is the free, multi-layered security application that keeps hackers out and personal information in. Built from the ground upwards with your security in mind, CIS offers 360° protection by combining powerful Antivirus protection, an enterprise class packet filtering firewall, and an advanced host intrusion prevention system called Defense+. For both average and advanced users.
… More Edit

Recent posts

Icon_feed
Show

Want to add to the discussion? Log in and write a review

  • Mystfit expert

    Pretty much the only package you need. First thing I install on a new Windows installation after Firefox.

  • Patrick fanatic
    Features:
    Performance:
    Interface:
    Price:

    I was on the hunt for the best free firewall software on Windows and I think I finally found it with Comodo. It has most of the features of the non-free firewalls which is great because it can be simple for novice users but it can also be advanced enough for experts.

  • Neil García devotee
    Features:
    Performance:
    Interface:
    Price:

    I use this firewall from three years ago, in XP and now in 7 Professional. It's cool, intercepts every strange conecction, doesn't use much RAM and works smoothly. I love this firewall :D

  • Computer Consultancy Amstelveen devotee
    Features:
    Performance:
    Interface:
    Price:

    http://www.matousec.com/projects/proactive-security-challenge/results.php

    2009-10-10: A single product update:

    * Comodo Internet Security 3.12.111745.560

    Per its vendor's request, we have tested the latest version of Comodo Internet Security. As the first product, Comodo Internet Security reached the perfect score against all 84 tests in the testing suite. Congratulations!

    Comodo Internet Security
    3.12.111745.560FREE 100% 10+ Excellent – 100%

  • Gamer devotee
    Features:
    Performance:
    Interface:
    Price:

    Best firewall that is working on Windows 7 that is free FREE and tracks every connectiong trying to connect outside world.

  • yxx41 fanatic

    for me,it's hard to config,besides this,CIS is perfect.

  • NonExistence expert
    Features:
    Performance:
    Interface:
    Price:

    Just the best freeware firewall.

  • GigiAUT expert
    Features:
    Performance:
    Interface:
    Price:

    Five stars all round. Free, great performance and it's easy to use. The pop ups do get annoying every time you try to do something new with a piece of software but you get used to it.

  • nimdasek fanatic

    yeahh!! free and very useful. best firewall ever (except kerio 2.ileśtam)

  • dmtr fanatic
    Features:
    Performance:
    Interface:
    Price:

    just great one. really enjoy the perfomance

  • StFenix expert
    Features:
    Performance:
    Interface:
    Price:

    A very powerful, and sometimes intrusive Security program that does all it says and more. It has a fairly valued Anti-virus as well as multiple levels of Firewall security for the user, it is also extremely compatible being the only Windows XP Professional x64 firewall.

  • aero fanatic
    Features:
    Performance:
    Interface:
    Price:

    I don't use the A/V component but the firewall is fantastic.

  • ifthenelse fanatic
    Features:
    Performance:
    Interface:
    Price:

    A very functional application. But If I were in Comodo, I'd try to improve the interface, which sometimes could be a bit disorienting, expecially for beginners. Also, I would add a sort of filter in the file submission window: I don't have the time to separate evident non-malicious software to suspect files by myself every time (this would prevent to see thousands of file in the suspicious list, which sometimes is a bit frustrating).
    As last notice, I don't know if it happens just to me, but the on-line secure-file-checker returns "unknown state" 9 times out of 10.

  • Computer Consultancy Amstelveen devotee
    Features:
    Performance:
    Interface:
    Price:

    I use the latest CIS 3.11 and have to say that the software is state of the art. Completely installed its a total protection tool with a firewall, anti-virus and D+. I have used this for a while now and it works like a charm. The Defence+ option is a live safer. In version 4 there will be a new item that can set your system back in time. Looking forward tho that.

  • Paul Lammertsma fanatic
    Features:
    Performance:
    Interface:
    Price:

    It's "free forever", which makes it simply awesome.

    There's room for improvement, though. I wish they wouldn't use a skinned interface, and the task icon's right-click menu could use some redesigning.

    The training mode is brilliant and saves lots of frustration!

Screenshots

Icon_prev Icon_next
  • Thumb
  • Thumb
  • Thumb
  • Thumb
  • Thumb
Website: personalfirewall.comod...
Developer: COMODO
License: Free
Version: 3.13.119746.572
Rating: Features:
Interface:
Performance:
Price/value:
Overall:
Usage: 2 months, 3 weeks, 6 days, 18 hours, 2 minutes and 43 seconds
Usage since: 02 May 2007
Share:

Popularity over the last 30 days (?)

Comodo Intern... vs.

Rank: #447