10 Useful Open Source Security Firewalls for Linux Systems

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Tarunika Shrivastava

I am a linux server admin and love to play with Linux and all other distributions of it. I am working as System Engineer with a Web Hosting Company.

Your name can also be listed here. Work as a Paid freelancer/writer at TecMint.

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23 Responses

  1. Vix says:

    @ Michael ,

    When u says Half baked knowledge is wonderful , assume u have full cooked knowledge.

    Asking you a simple question.
    I have 5510 Cisco in my org. I want to replace it with and option to opensource but eventually when it finally goes off .

    What is the best options.,
    It is currently being used for :
    1. seting up in-out bounds
    2. DMZ
    3. VPN
    4. less amount of Network monitoring.

    Suggest a best piece of the LINUX OpenSource FW ,eventhough it is tough to manage it should be able to update dnsbl list and other UTM/IDS functions up-to-date.

    Thanks in advance for your suggestions.

  2. Nix says:

    All you need is to type these two commands in a terminal emulator.

    No need to install third party firewalls.

    sudo ufw enable
    sudo ufw default deny

  3. vijay says:

    hi , i want block not to uploding my files to internet . like pdf ,ppt, doc, kind of files. users not allow organigation classified information files to gmail attchments . i tried every possible way some of opensource firewalls , but i could not get this kind of policy please help me out with open source firewall and linux.

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  5. Ambesh says:

    in my small network i want to block few selected websites and application like torrent downloader….plz suggest me few open source firewalls which can do my work perfectly. i have CentOS 6.3 in admin PC and rest PC are windows.

  6. Michael says:


    Configserver, UFW, Shorewall… are nothing but front ends to make using iptables easier.

    There is only ONE firewall on LINUX – iptables.

    Everything else is a front end to iptables. There are more front ends such as Arno’s firewall, KISS etc.

    PfSense is a BSD firewall – nothing to do with Linux.

    Evidently, half baked knowledge is a wonderful thing.

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