Linux Networking
NetCat
nc -llvp 1234 # Listen on 0.0.0.0 of port 1234
nc <ip> 1234 # Connect to <ip> with port 1234
nc -llvp 1234 # Listen on 0.0.0.0 of port 1234
nc <ip> 1234 # Connect to <ip> with port 1234