Ha megtennéd hogy megnézed neked mi szerepel az etc/services nevü file-ban.
Nem tudom mi a szerepe de fura dolgok vannak benne.
/etc/services:
# $Id: services,v 1.9 2001/04/13 03:13:08 chmouel Exp $
#
# Network services, Internet style
#
# Note that it is presently the policy of IANA to assign a single well-known
# port number for both TCP and UDP; hence, most entries here have two entries
# even if the protocol doesn’t support UDP operations.
# Updated from RFC 1700, „Assigned Numbers” (October 1994). Not all ports
# are included, only the more common ones.
# Merged list from:
# http://www.isi.edu/in-notes/iana/assignmen…ts/port-numbers
0/tcp Reserved
0/udp Reserved
# Jon Postel
tcpmux 1/tcp TCP Port Service Multiplexer
tcpmux 1/udp TCP Port Service Multiplexer
# Mark Lottor
compressnet 2/tcp Management Utility
compressnet 2/udp Management Utility
compressnet 3/tcp Compression Process
compressnet 3/udp Compression Process
# Bernie Volz
legutóbbi hsz