Alternatives to ZoneAlarm Free Firewall for all platforms with Open Source License

  • Gufw

    Gufw is an easy, intuitive way to manage your Linux firewall. It supports common tasks such as allowing or blocking pre-configured, common p2p, or individual ports...

    Free Open Source Linux

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  • OpenSnitch

    OpenSnitch is a GNU/Linux port of the Little Snitch application firewall.

    Free Open Source Linux

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  • Firestarter

    Firestarter is an Open Source visual firewall program. The software aims to combine ease of use with powerful features, therefore serving both Linux desktop users and...

    • Discontinued Active development stopped in 2005.

    Free Open Source Linux

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  • Nufw

    NuFW is a GPL extension to Netfilter (that is Linux firewall). It adds identity-based filtering, i.e. it is possible to create firewall rules dependent on the user. ...

    Free Open Source Linux netfilter

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  • Guarddog

    Guarddog is a firewall configuration utility for Linux systems. Guarddog is aimed at two groups of users. Novice to intermediate users who are not experts in TCP/IP...

    Free Open Source Linux

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  • Core Force

    CORE FORCE is a free comprehensive endpoint security solution for Windows 2000 and Windows XP systems. CORE FORCE provides inbound and outbound stateful packet...

    • Discontinued Last modification date: 10/25/05. See https://www.coresecurity.com/grid/index-open-source-tools

    Free Open Source Windows

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  • Leopard Flower

    Personal firewall for Linux OS (based on libnetfilter_queue) which allows to allow or deny Internet access on a per-application basis rather than on a port/protocol...

    • Discontinued I think this software is discontinued because this link: http://sourceforge.net/projects/leopardflower/ is no longer available at Sourceforge! According to me that only happens with obsolete/removed software titles.

    Free Open Source Linux

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  • NetDefender

    NetDefender is a free and open source firewall for Windows 2000/XP. Features: * User can Block all Traffic and can Allow all traffic through just one mouse click *...

    Free Open Source Windows

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Platforms

Desktop

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