A pf based firewall ruleset to control traffic
This project aims to highlight the pf(4) firewall capability of OpenBSD. It is well integrated with the kernel and does sophisticated networking functions like IP blocking, traffic load balancing, NAT and port forwarding in addition to several others
pfck - pf check - organizes flow information by host
pfck is a perl script that reads the state table of pf and reports back flows based on a supplied port number. pfck is very handy in ddos attacks to identify who's hitting a host or network on a particular port service, and who they are specifically hitting.
pppit allows one to tunnel through a firewall which only allows proxy telnet, such as SWAN. It is a modified, special-purpose ppp daemon.
Managing OpenBSD's Packet Filter with Python
py-PF is a pure-Python module for managing OpenBSD's Packet Filter. It aims to combine the flexibility of PF's C API and the power of Python, making it easier to manage PF data and to integrate firewalling capabilities in more complex applications.
Traffic shaper for vpn, poptop, etc., using iproute2
A Free SOCKS proxy server for Linux, macos and FreeBSD