HP-UX Networking Ports Reference Guide

Chapter 1
Port Numbers and Ranges
Port and Port Range Use
2
Port and Port Range Use
The following ports and port ranges are used by HP-UX 11i version 1 and HP-UX 11i version 2.
NOTE This guide contains only port numbers and port ranges used by HP-UX services and
applications. For a complete list of standard networking port numbers, go to
www.iana.org/assignments/port-numbers.
Table 1-1
Port/Port
Range
Service/Application Protocol Description
0-1023 Well-known ports n/a Well Known Ports are assigned by the IANA. These
ports can only be used by system or root processes,
or by applications executed by privileged users.
1 tcpmux TCP TCP port service multiplexer
Not common on HP-UX.
You can edit the /etc/inetd.conf file to comment
out or disable this service.
5 rje TCP/UDP Remote Job Entry Service
Not common on HP-UX.
You can edit the /etc/inetd.conf file to comment
out or disable this service.
7 Echo TCP/UDP Line Echo Port
Archaic port that can be used as an attack vehicle.
It is recommended that you edit the
/etc/inetd.conf file to comment out or disable
this service, or use SAM to disable this service.
9 Discard TCP/UDP Character Discard Port, also called Sink or Null
Archaic port that can be used as an attack vehicle.
It is recommended that you edit the
/etc/inetd.conf file to comment out or disable
this service, or use SAM to disable this service.
11 systat TCP Active Users, also called users
13 Daytime TCP/UDP Report time of day as set on system.
Archaic port that can be used as an attack vehicle.
It is recommended that you edit the
/etc/inetd.conf file to comment out or disable
this service, or use SAM to disable this service.
17 qotd TCP/UDP Quote of the Day
Archaic port that can be used as an attack vehicle.
It is recommended that you edit the
/etc/inetd.conf file to comment out or disable
this service, or use SAM to disable this service.