Configuring SNMP

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Description:

Many times administrators will want to monitor servers, switches, ect. Aside from simple ping tests, WMI queries, ect. you may find yourself wanting to use SNMP. SNMP is a chatty protocol that you can learn about my just googling the phrase. Essentially, V3 is recommended but I have only really seen V2 with a custom community string configured.

To Resolve:

  1. If I wanted to monitor a switch, for example to send SNMP logs to a PRTG server, I would do the following. For example on my Ubiquity switch: Login via web GUI. Go to System – Advanced – SNMP. Add community – enter community name (make one up, but make sure you know it because all devices will need to be on the same one), set group name to DefaultRead, and IP address to the target server. I would then go to the Trap Receiver V1/2 and add HostAddress = Host of switch, Community name = same as above, Notify Type = Inform, UDP Port 161. That’s it! Logs will just roll in.

  2. For servers, you add the “SNMP Service” feature. After it’s installed, just run services.msc and go to the SNMP service. Under Security – Check the box to send authentication traps and set the community rights to ReadOnly and the community string to your own string. Click Add. NOTE: If the security tab does not show up, close out of service.msc and open it back up. For more details, see this post but note that you should never use “public” as the community name.

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