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

    Gufw icon
  • OpenSnitch

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

    Free Open Source Linux

    No features added Add a feature

    OpenSnitch icon
  • 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...

    Free Open Source Linux

    No features added Add a feature

    Firestarter icon
  • CacheGuard-OS

    CacheGuard OS is an Appliance oriented Operating System dedicated to Web traffic Security and Optimization.

    Free Open Source Windows VirtualBox VMware vSphere Hypervisor Microsoft Hyper-V Server Proxmox Virtual Environment

    No features added Add a feature

    CacheGuard-OS icon
  • 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

    Nufw icon
  • 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

    No features added Add a feature

    Guarddog icon
  • 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...

    Free Open Source Windows

    No features added Add a feature

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

    Free Open Source Linux

    No features added Add a feature

    Leopard Flower icon
    • 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.
  • 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

    No features added Add a feature

    NetDefender icon

Platforms

Desktop

Show 5 less popular platforms