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aymenbj
aymenbj
New Member
January 1, 2026
Question

Problem Adding FortiGate to FortiManager 7.4.8

  • January 1, 2026
  • 1 reply
  • 470 views

I am experiencing an issue while trying to add a FortiGate (v7.0.12) to FortiManager (v7.4.8) in an EVE-NG lab environment using trial VMs.

The FortiGate fails during the registration/enrollment process with FortiManager (certificate authentication / connection issue).

Thank you for your support.

1 reply

jiahoong112
Staff
jiahoong112
Staff
January 1, 2026

You seem to be facing an issue whereby the fortinet_factory certificate on your FortiGate does not contain the Serial Number of the FortiGate itself, causing certificate issue when trying to establish the fgfm connection: https://community.fortinet.com/t5/FortiManager/Troubleshooting-Tip-Common-issues-while-adding-FortiGate-to/ta-p/396147 

If it's not this, please paste a screenshot of the error message that you are getting. Are you seeing the FortiGate Serial Number under the CN parameter of the fortinet_factory certificate? To check this, go to System -> Certificate.

    StefanW13
    StefanW13
    New Member
    January 15, 2026

    I have the same issue with FMG 7.4.8 and FGT 7.4.9. I followed the troubleshooting guide and confirm matching Scenario 3. The SN is not included in CN field.  

     

    If the CN is showing as "FortiGate" instead, then run the below command in FortiGate CLI : execute vm-license

    I tried using "execute vm-license" with and without the token but both is failing.

     

    I check multiple Troubleshooting tips but turning in circles.

     

    How to register a FortiGate to a FortiMan... - Fortinet Community

    How to troubleshoot connectivity issues b... - Fortinet Community

    Common issues while adding FortiGate to F... - Fortinet Community

    Installing FortiManager KVM on EVE-NG and... - Fortinet Community

     

    Thanks for you support.

    Stefan

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