Simple port forwarding

Forward network data stream from port A to port B on same machine.

node port_forwarding.js [--from incoming_port] [--to port_to_forward] [--log]

• --from <incoming_port>: listening port that remote application connect to. Default: 8080.
• --to <port_to_forward>: local port that will receive forwarded data. default: 9090.
• --log: enable trace logs (stdout).

Test example:

Telnet ----> host:portA ------> host-localserver:portB

• run test_server.js -> node test_server.js [port_test]
• run port_forwarding -> node port_forwarding.js [--from incoming_port] --to port_test
• run telnet -> telnet host incoming_port

Then, on telnet prompt, type some text then Enter -> 'ACK: typed text' sent back.