Firewalls & Routing

Next-generation firewall platform. Application control, web filtering, virus blocker, spam blocker, and VPN. Free lite version available.

Modern replacement for iptables. Unified framework for IPv4, IPv6, ARP, and bridge filtering. Better performance and simpler rule syntax.

Tool for maintaining complex firewall rules using structured config.

Hardened Linux firewall distribution. Stateful packet inspection, IPS (Suricata), VPN, web proxy, and QoS. Easy to manage via web UI.

Uncomplicated Firewall — user-friendly frontend for iptables. Simple command-line interface for managing netfilter rules. Default on Ubuntu.

Alpine Linux firewall configuration tool using JSON policies.

GNU/Linux interactive application firewall inspired by Little Snitch.

Classic Windows firewall with basic intrusion prevention.

Classic Linux kernel firewall. Packet filtering, NAT, port forwarding, and logging. Foundation of Linux networking for decades.

High-level tool for configuring Netfilter firewalls on Linux.

Free, open-source firewall distribution. Turns a PC into a dedicated firewall/router. Web interface, VPN, traffic graphs, and IDS.

ConfigServer Security and Firewall for Linux server hardening.

Unified threat management appliance. Stateful firewall, antivirus, anti-spam, content filtering, VPN, and web-based management.

Open-source network OS providing routing, firewall, and VPN.

Open-source firewall and router platform based on FreeBSD. Stateful firewall, VPN, traffic shaping, IDS/IPS, and web-based management.

Dynamic firewall manager for Linux. D-Bus interface, zones, runtime and permanent configuration. Default firewall on RHEL/CentOS/Fedora.

Open-source, easy-to-use firewall and routing platform. Fork of pfSense with modern UI, weekly updates, and plugins ecosystem.