Download for Snort, an open source network intrusion prevention and detection system utilizing a rule-driven language, which combines the benefits of signature, protocol, and anomaly-based inspection methods.
Software designed to produce a hardened Internet firewall device by turning a server, workstation, or redundant PC into a replacement for a hardware firewall router.
SOCKS Proxy Protocol
SOCKSv5 adds authentication and authentication method negotiation, message integrity and privacy, and UDP proxy.
Firewall testing utility from Gibson Research.
A system for stealthy authentication across closed ports.
Network Utilities (Systems) Ltd
Suppliers of network administration tools and security software. Products include steel belted radius, VPNs, firewalls, and remote control software.
An automated firewall builder tool for Linux.
How To SOCKSify
Converting an application to use the SOCKS protocol normally only requires adding an #include directive and linking with the socks5 library.