Security is paramount. Security involves defense in depth. Approaching security one step at a time, with consistency and rigour, you can mitigate threats, and keep intruders at bay.
| pfSense |
Powerful firewall and routing platform based on FreeBSD |
| ClearOS |
Dedicated firewall and Internet server/gateway |
| Untangle |
Quality open source alternative to SonicWALL and WatchGuard |
| IPFire |
Distro with a versatile and state of the art firewall engine |
| Smoothwall Express |
Firewall with its own security-hardened Linux distro |
| Shorewall |
High-level tool for configuring Netfilter |