Browse free open source Firewall software and projects for Windows below. Use the toggles on the left to filter open source Firewall software by OS, license, language, programming language, and project status.
HTTP proxy to block ads and customize webpages
Manage port forwardings via UPnP
Bypass your ISP's firewalls and connect to the internet!
Serve as a reverse proxy to protect your web services from attacks
PeerGuardian - a privacy oriented firewall application
A java PCAP and DPI library
OPNsense is an open source, easy to use firewall and routing platform
Next Generation Open Source Firewall
A client for the MikroTik RouterOS API protocol, written in PHP.
Sonicwall Configuration File Reader
OWASP Coraza WAF is a golang modsecurity compatible firewall library
CacheGuard Gateway is a Unified Threat Management (UTM)
Anti Spam SMTP Gateway