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 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)

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

Proof of concept Linux backdoor with client written in Python

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.

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。

Stuk is a solution for securely managing SSH on remote computers using Port knocking mechanism. Enables automatic provisioning of SSH keys and access with a multiple access control (MFA) and/or Universal (U2F) authentication factor. Scalable solution and applicable to cloud and physical IT infrastructures.

A Port-Knocking System. Used along other security systems, improves security.

🚪 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).

Port Knocking in Perl (But also compiled for Win64)

Cross-Platform Advanced Network Scanner for Windows or Debian / Raspbian with port scanning!

Port Knocking attack tool

A package containing implementations of port knocking using the libpcap wrappers in Google's gopacket library.

A port knocking code, written in python3

Simple scripts for generating one time sequences for knockd and for knocking a host with either netcat or nmap

Trans server on http-knocking

Simple python port knocking script for linux

Knocking server in 50 lines with scapy

Port Knocking technique with AES256-GCM

knockd rewrite without libpcap dependency

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

Tools to use with Judd Vinet's knockd

Example of http-knocking on Docker Compose