ss & unhide command nvel dcouverte :p

NAME
       ss - another utility to investigate sockets

SYNOPSIS
       ss [options] [ FILTER ]

DESCRIPTION
       ss  is  used to dump socket statistics. It allows showing information similar to net‐
       stat.  It can display more TCP and state informations than other tools.


The netstat -tulpn or ss commands displayed nothing about the hidden TCP ports # 1048, 1049, and 1050:
# netstat -tulpn | grep 1048
# ss -lp
# ss -l | grep 1048


unhide

http://www.cyberciti.biz/tips/linux-unix-windows-find-hidden-processes-tcp-udp-ports.html