HP-UX LAN Administrator's Guide (Feburary 2007)

DRAFT COPY Manually Installing and Configuring HP-UX LAN
Activating Optional Network Features
Chapter 4 31
Activating Optional Network Features
To activate special network features, you may also want to configure /etc/services,
/etc/networks, and /etc/protocols. Each of these steps is optional.
NOTE If you are using NIS, modifications to the /etc/services, /etc/networks and
/etc/protocols files should only be made on the NIS Master Server. Refer to
the NFS Services Administrator’s Guide for more information
Modifying the /etc/services File
The /etc/services file associates port numbers with mnemonic service names and alias
names. The /etc/services file contains the names, protocol names, and port numbers of all
services known to your local host. The netstat diagnostic uses the /etc/services file.
If you install HP-UX Internet Services or HP-UX NFS, these products will also use the
/etc/services file.
NOTE You can modify this file if you have special requirements, but it is properly
configured when you receive HP-UX LAN.
/etc/services
Each service has a one line entry in the /etc/services file. Each entry in /etc/services file
takes the following form:
Syntax
service_name port_num / protocol [ alias ]...
Parameters
service_name Name of the service. Service names can contain any printable character
except spaces, newline, or the comment character (#).
port_num / protocol port_num is the protocol port number assigned to this service. All
requests for this service must use this port number.
protocol is the protocol
name, as listed in /etc/protocols, that the service uses.