ncat

Read, write, redirect, and encrypt data across a network. An alternative implementation of a similar utility called netcat/nc. More information: https://nmap.org/ncat/guide/index.html.

ncat -l port > path/to/file

ncat -lk port

ncat address port < path/to/file

ncat --ssl -k -l port

ncat --ssl host port

ncat -w seconds -vz host port