Enhanced and comptaible Netcat implementation written in Python (2 and 3) with connect, zero-i/o, listen and forward modes and techniques to detect and evade firewalls and intrusion detection/prevention systems. If no mode arguments are specified, pwncat will run in connect mode and act as a client to connect to a remote endpoint. If the connection to the remote endoint is lost, pwncat will quit. See advanced options for how to automatically reconnect.

Sources : https://github.com/cytopia/pwncat