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 .1.3.6.1.2.1.1

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

To:

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

To:

com2sec notConfigUser default anything_you_need