lsof -n -i4TCP:{PORT} | grep LISTEN
http://stackoverflow.com/questions/4421633/who-is-listening-on-a-given-tcp-port-on-mac-os-x
lsof -n -i4TCP:{PORT} | grep LISTEN
http://stackoverflow.com/questions/4421633/who-is-listening-on-a-given-tcp-port-on-mac-os-x