一款足够简单、足够好用、足够强的免费 WAF。基于业界领先的语义引擎检测技术，作为反向代理接入，保护你的网站不受黑客攻击。 A free WAF that is sufficiently simple, effective, and powerful. Utilizing industry-leading semantic engine detection technology, it operates as a reverse proxy to protect your website from hacker attacks.

Fort Firewall for Windows

eBPF/XDP-based software framework for fast network services running in the Linux kernel.

A high performance framework for forwarding traffic based on DPDK

Zorp GPL

Geographical host protection for Linux/FreeBSD

Noddos client

Paragon Firewall for Mac

DHCP & DNS server optimized for home gateways.

Butterfly connects Virtual Machines and control their traffic flow

Firewall KCM

Bindings for Windows Firewall from Rust

See https://github.com/GTA5Oracle/EliteSpeedrunTool. A GTAOL doomsday scenario speedrun tool that supports quick startup of the firewall, automatic counting of headshots and timing. This tool only reads the memory and does not write the memory. 一个 GTAOL 末日三速通工具，支持快速启动防火墙、自动统计爆头数、手动计时。

USB Firewall is a tool that employs the Kernel device authorisation feature and udev rules to provide a defence against certain Bad USB attacks. WIP...

windows user mode network library

SENG: reliable, central per-application firewall policies via Intel SGX based client shielding

A linux toy firewall

FPGA and firmware images for the USRP2 to operate as a Wireless Firewall (WiFire)

A lightweight windows firewall API in C++

Este programa permite activar o desactivar fácilmente el cortafuegos de Windows