Multiple SNMP communities in GAiA R76 and R77

When using SPLAT, we can edit most of the OS level files do customisation. One such thing is the SNMP configuration file.
For instance if you need to add multiple SNMP read-only communities you can add all the communities by editing the /etc/snmp/snmpd.users.conf
With the the introduction of GAiA we can't edit the snmpd.conf manually, and there is no snmpd.users.conf file in the /etc/snmp directory.

In GAiA,bathe SNMP settings are configured either using the WebUI or using the clish commands. But using these two options you can only define one read-only and one read-write community.

But from R76 and above there is a built-in file in /etc/snmp directory for all the user defined snmp settings.
/etc/snmp/userDefinedSettings.conf 

This file can be used as the snmpd.user.conf file. Before editing this file, you have to stop the snmp agent.

So if you want to add an additional read-only community, you can edit this file and add the following line and save it.

rocommunity <additional ro community>

After saving this file, you need to re-enable the snmp agent.

The thing is, when you issue the clish command "show snmp communities" you will not see the additional communities that you have defined.

In the initial releases of GAiA the /etc/snmp/userDefinedSettings.conf file is not present.

The SK article sk79280 explains how to add SNMP user defined settings in detail. 

https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk79280

This article is very useful if you are running GAiA versions below R76.