netcat

Netcat is a Node.js library that provides client and server functionalities for TCP and UDP communication, allowing users to create backdoors, transfer files, perform port scanning, and set up proxies. It closely mimics the command-line netcat tool, enabling operations such as serving files, executing remote commands, and maintaining keepalive connections with configurable options like data filtering and IP address management. The tool is built entirely in JavaScript and is easy to integrate into applications via its API.