Design and simulate firewall rules — before they bite.

    RuleForge is a visual iptables builder and packet simulator for sysadmins, DevOps engineers, and homelab enthusiasts.

    internetfirewalldmzlan

    This is the real engine. Free, in your browser, nothing to install.

    Open the Builder

    Design

    Drag-and-drop routers, firewalls, load balancers, zones and subnets into a living network diagram.

    Simulate

    Fire packets through your topology and watch every chain, rule match and NAT rewrite — step by step.

    Export

    Save projects as JSON and re-run simulations headlessly with the CLI.