OWASP Coraza WAF is a golang modsecurity compatible firewall library
Advanced open source tool for bypassing DPI-based censorship
Cross-platform multi-protocol VPN software
A dead simple VPN
Intelligently block brute-force attacks by aggregating system logs
Manage port forwardings via UPnP
Robust and flexible VPN network tunnelling
Proxy Cache and Web filtering Appliance
A client for the MikroTik RouterOS API protocol, written in PHP.
Linux firewall distribution geared towards home and SOHO users.
pfck - pf check - organizes flow information by host
SSH Java client GUI for Unix, Linux administration and monitoring
IOSec Addons are enhancements for web security and crawler detection
the OpenSSH VPN, without the VPN
Distributed reverse / forward proxy and tunneling solution for TCP.