Users Guide

Table Of Contents
32 Setup and Administration
To configure your system running Server Administrator to send traps to a management station, edit the
SNMP agent configuration file, /etc/snmpd.conf or /etc/snmp/snmpd.conf, and perform the following steps:
1
Add the following line to the file:
trapsink IP_address community_name
where
IP_address
is the IP address of the management station and
community_name
is the
SNMP community name.
2
To enable SNMP configuration changes, restart the SNMP agent by typing:
/etc/init.d/snmpd restart
X.509 Certificate Management Prerequisites
Web certificates are necessary to ensure the identity of a remote system and to ensure that information
exchanged with the remote system cannot be viewed or changed by others.
This section explains the administrative prerequisites for ensuring your ability to generate a new
X.509 certificate, reuse an existing X.509 certificate, or import a root certificate or certificate chain from
Certification Authority (CA) on each supported operating system.
The X.509 certificate management is provided through the Server Administrator home page for all
supported operating systems.
Firewall Configuration on Systems Running Supported Red Hat
Enterprise Linux Operating Systems
If you enable firewall security when installing Red Hat Enterprise Linux, the SNMP port on all external network
interfaces is closed by default. To enable SNMP management applications such as IT Assistant to discover and
retrieve information from Server Administrator, the SNMP port on at least one external network interface
must be open. If Server Administrator detects that the SNMP port is not open in the firewall for any external
network interface, Server Administrator displays a warning message and logs a message to the system log.
You can open the SNMP port by disabling the firewall, opening an entire external network interface in
the firewall, or opening the SNMP port for at least one external network interface in the firewall. You can
perform this action before or after Server Administrator is started.
To open the SNMP port using one of the previously described methods, perform the following steps:
1
At the Red Hat Enterprise Linux command prompt, type
setup
and press <Enter> to start the
Text Mode Setup Utility.
NOTE: This command is available only if you have performed a default installation of the operating system.
The
Choose a Tool
menu appears.
2
Select
Firewall Configuration
using the down arrow and press <Enter>.
The
Firewall Configuration
screen appears.