Zorp GPL is described as 'Next generation, open source proxy firewall with deep protocol analysis. It allows you to inspect, control, and modify traffic on the application layer of the ISO/OSI model. Decisions can be made based on data extracted from the application-level traffic (for' and is a Firewall in the security & privacy category. There are four alternatives to Zorp GPL for Linux, BSD and Self-Hosted. The best Zorp GPL alternative is OPNsense, which is both free and Open Source. Other great apps like Zorp GPL are pfSense, IPFire and Smoothwall.
OPNsense includes most of the features available in expensive commercial firewalls, and more in many cases. It brings the rich feature set of commercial offerings with the benefits of open and verifiable sources.
OPNsense is the most popular Self-Hosted alternative to Zorp GPL.
OPNsense is the most popular Open Source & free alternative to Zorp GPL.
pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more.
IPFire is a server distribution with intended to use as a firewall. It focuses on flexibility, and scales from small to middle sized business networks and home networks.
IPFire is the most popular Linux alternative to Zorp GPL.
The SmoothWall Open Source Project was set up to develop and maintain SmoothWall Express - a Free firewall that includes its own security-hardened GNU/Linux operating system and an easy-to-use web interface.
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