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IPFire

Firewalls

Secure Your Network with IPFire, the World's Leading Open Source Firewall

Little Snitch

Firewalls

Protect your privacy and control your Mac's network activity

Lockdown

Firewalls

Protect your personal data with a powerful firewall and VPN

LuLu

Firewalls

LuLu: A Free, Open-Source Firewall for macOS

NetGuard

Firewalls

Control internet access per app with ease

OPNSense

Firewalls

Open source, feature-rich firewall and routing platform for cutting-edge network protection

OpenSnitch

Firewalls

Interactive Application Firewall for GNU/Linux

Safing

Firewalls

Take control of your computer's network connections with Portmaster

Shorewall

Firewalls

Shorewall: A Gateway/Firewall Configuration Tool for GNU/Linux

SimpleWall

Firewalls

Simplewall: A Free and Open-Source Firewall for Windows

Uncomplicated Firewall

Firewalls

Simplify your firewall management with Uncomplicated Firewall

pfSense

Firewalls

Secure networks start here with the world's most trusted open source firewall