Feb 05 2013

Solved: No SNMP Response from Fortigate Firewall

Published by at 12:47 pm under Fortinet

SNMP is a protocol widely used to get a lot of metrics from network hardware, servers and others. I configured SNMP on the internal interface of a Fortigate 100D from Fortinet. Even though I ticked the checkbox called “enabled”, I am getting a timeout when I run cfgmaker (to configure MRTG) or snmpwalk tools. No SNMP response from the Fortigate whatsoever.
However, I do not get this issue on a Fortiwifi 60B, which is a smaller Fortigate unit.

It took me a while to figure it out but here is the trick. You have to configure the management interface and query that interface if you want to get SNMP information for all other interfaces. Management is a dedicated interface with a physical port just below the DMZ port. Configuring any other interface is useless and you will not get any SNMP response.

Fortigate 100D and SNMP

I looked up on Fortinet support website but this issue does not seem to be documented anywhere, at least at the time of this writing. Note that I did not experience the issue on smaller Fortinet firewalls because they have no physical management interface.
You now know what to do if you get no SNMP response from your Fortigate device now. Hope this helps!

2 responses so far

2 Responses to “Solved: No SNMP Response from Fortigate Firewall”

  1. andreas petzelon 23 Mar 2016 at 3:49 pm

    I also have the issue of not being able to get any SNMP answer from my fortigate 100D firewalls. forums I see lots of issues and work around. only I have not yet found the 1 to solve my issue.

    and I was from the beginning using the mgmt interface.

    my setup is an HA A-P setup with several VDOM’s

    anyone that can give tips would be great

  2. Henryon 28 Aug 2021 at 8:39 pm

    I had no SNMP response too from my Fortigate and this did solve the problem


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