Available on Windows

The most popular firewall on Windows

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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.
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  • Gamer devotee
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    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 devotee
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    Just the best freeware firewall.

  • GigiAUT expert
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    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
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    just great one. really enjoy the perfomance

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

  • ifthenelse fanatic
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    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
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    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
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    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!

  • rezajoon expert
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    The best firewall ever! free, easy to use, and open source.
    you use AVs to get rid of viruses, use Comodo to not getting any viruses.

  • rezajoon expert
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    The Best firewall ever! free, easy to use, and open source.
    you use AVs to get rid of viruses, use Comodo to not getting any viruses.

  • Sideofmeh fanatic
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    Really nice security program.

  • CloudGer expert
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    I use it for firewall purposes mainly and I'm quite satified. With comodo you really have the control what gets in and out your comp.

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Website: personalfirewall.comod...
Developer: COMODO
License: Free
Version: 3.12.111745.560
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Usage: 2 months, 3 weeks, 4 days, 4 hours, 47 minutes and 39 seconds
Usage since: 02 May 2007

Popularity over the last 30 days (?)

Comodo Intern... vs.

Rank: #513