>Many times, when I’ve read interesting articles about netcat features, I’ve found that the best method to use it in listen mode is:
$ nc -lvvp <port> (simple listen mode)
but I have never found the following simple command:
$ nc -dLvvp <port>
that I think is the best method to use netcat in listen mode; in fact L option is better than l in order to create a better connection and d in essential to run netcat in background independently from the shell.
I hope that this can be useful for you 😉