How to monitor FortiGate HA members with PRTG

In order to increase network reliability, FortiGate provides you with a cluster feature. PRTG helps you to monitor the sync status between cluster nodes and check if all nodes are fully operational. Check how to monitor your HA members with PRTG.

One of the ways to improve network reliability is to implement high availability. FortiGate provides you with a feature to implement active-active or active-passive clusters – depending on your needs.

There are some requirements to configure clusters such as the same FortiOS and static IP address.

High availability with two FortiGates

The topic of this article is not about configuring the FortiGate cluster but monitoring the FortiGate cluster with PRTG.

There are no native sensors named FortiGate cluster, however, there is a trick on how to do it. The cluster status value can be delivered using SNMP.

  1. Log in to your PRTG web UI
  2. Navigate to your FortiGate device.
  3. Add SNMP Custom table sensor and add the following OID
1.3.6.1.4.1.12356.101.13.2.1
  1. PRTG will do a meta scan and show you what cluster nodes are available (if any). As you can see in my case, there are two cluster nodes available. I will select both of them.
FortiGate HA nodes
  1. PRTG will create one for each node one sensor. Based on the screenshot above, two sensors will be created. This sensor will show CPU and memory usage, session count, and sync status.
FortiGate HA member status

This was easy. Isn’t it!?

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