Simple tool to configure Windows Filtering Platform (WFP) which can configure network activity on your computer.

A full functional WiFi Repeater (correctly: a WiFi NAT Router)

WinDivert: Windows Packet Divert

Connect like there is no firewall. Securely.

A firewall that utilizes the Linux kernel's XDP hook. The XDP hook allows for very fast network processing on Linux systems. This is great for dropping malicious traffic from a (D)DoS attack. IPv6 is supported with this firewall! I hope this helps network engineers/programmers interested in utilizing XDP!

A zero-configuration (IoT) firewall

NPF: packet filter with stateful inspection, NAT, IP sets, etc.

Windows kernel-mode driver for controlling access to various input devices.

A free, fully open-source application firewall for MAC OS High Sierra and later. Allows real-time monitoring of network connections being made by applications, and blocking/allowing of these per app by user. Supports use of hostname lists (Energized Blu etc) to block known tracker and advertising domains for all apps. Also allows blocking of all…

"TCMPortMapper.framework" is a clean and nice Objective-C API to provide knowledge about and improve the reachability of your machine from the big bad internet. "Port Map.app" is a nice standalone sample app using the framework to display reachability and enable setup of Port Mappings if your router allows for it.

Packetgraph library is a collection of network bricks you can connect to form a network graph.

bouheki is KRSI(eBPF+LSM) based Linux security auditing tool.

A simple packet filtering firewall for Linux

Linux Application Firewall

一个tcp代理工具；借助公网服务器中转，可以把NAT内的远端设备的tcp端口映射至localhost，访问localhost映射端口相当于访问远端设备端口。

Program examples utilizing the DPDK. The DPDK is a kernel-bypass network library that allows for very fast network packet processing. This is great for (D)DoS mitigation and low-latency packet inspection, manipulation, and forwarding.

华中科技大学2021网络安全课程设计（基于netfilter的状态检测防火墙）

A high efficient ip black/white list firewall (work as a linux kernel module)

wolfSSL Intrusion Detection and Prevention System (IDPS)

This is a project to develop an ebpf program that uses ebpf tc to redirect ingress ipv4 udp/tcp flows toward specific dynamically created sockets and acts as a stateful firewall.