Resources about network security, including: Proxy/GFW/ReverseProxy/Tunnel/VPN/Tor/I2P, and MiTM/PortKnocking/NetworkSniff/NetworkAnalysis/etc。More than 1700 open source tools for now. Post incoming.

A web client port-scanner written in GO, that supports the WASM/WASI interface for Browser WebAssembly runtime execution.

A minimal tool that hides your online assets from online security scanners, researchers and hackers.

Layer 4 Single Packet Authentication Linux kernel module utilizing Netfilter hooks and kernel supported Berkeley Packet Filters (BPF)

A port-knocking implementation in Rust

OpenSPA - An open and extensible Single Packet Authorization (SPA) protocol

A port-knocking utility implemented in Go.

Authenticating port knocker - Written in Rust

🚪HTTP-Knocking hides a Web server and open it by knocking sequence: Hide Web server until your knocks

🚪👊 Yet another port knock client

Hybrid Port Knocking System

Port Knocking attack tool

Not your average port knocker. A web-based service written in pure PHP that opens protected TCP and UDP ports in response to encrypted requests from a correctly configured client for a limited but renewable time period. MIT or LGPL.

🚪 A port knocking client written in Go

Some of my security-related coding projects for OpenBSD: A kernel-based user-profile intrusion detection system (FUPIDS) and an ICMP-based "port-knocking" service (openportd).

nfqueue/ipset-based port knocking using JWT (JSON Web Token) as SPA (Single Packet Authorization)

Port-knocking client with multiple hosts support

Simple port knocking implementation using web requests. 使用 web 请求的简单 port knocking 实现。

Port Knocking in Perl (But also compiled for Win64)

Enable/Disable ports on windows using sequences of SYN packets sent to defined ports