Wednesday, 28 September 2011

How to Configure SNMP in Xenserver 5.x

Change firewall settings

You must change your firewall settings as follows to allow communication through the port that SNMP uses:

1. Open the file /etc/sysconfig/iptables in your preferred editor.

2. Add the following lines to the INPUT section after the line with -A RH-Firewall-1-INPUT –p udp –dport 5353... :
-A RH-Firewall-1-INPUT -p udp --dport 161 -j ACCEPT
3. Save and close the file.

4. Restart the firewall service:
# service iptables restart

Enable snmpd service
1. To enable snmpd service run the following command:
# chkconfig snmpd on
2. Start the snmpd service:
# service snmpd start

Change SNMP configuration
1. To change snmp configuration edit the /etc/snmp/snmpd.conf file.

2. Restart the snmpd service:
# service snmpd restart

SNMP configuration examples
Default settings
You can view only systemview subtree .

View whole subtree

1. Change lines as follows:
After the lines lines starting with:
view systemview included (...)
Add this:
view all included .1
Change line:
access notConfigGroup “” any noauth exact systemview none none
access notConfigGroup “” any noauth exact all none none
2. Save the file.

3. Restart the service:
# service snmpd restart
Change community string (default is “public”)
Change line:
com2sec notConfigUser default public
com2sec notConfigUser default anything_you_need

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