Top 6 port-knocking open source projects

Hybrid Port Knocking System

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

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

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

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

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