FortiGate
FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic.
ssteo
Staff
Staff
Article Id 343090
Description This article describes the Radius connection issue with FortiAuthenticator after FortiGate upgraded to 7.2.10 or 7.4.5.
Scope FortiGate v7.2.10/v7.4.5, FortiAuthenticator v6.4.9, v6.5.5, v6.6.1 or older. 
Solution

After FortiGate upgrades to v7.2.10/v7.4.5, it will show 'invalid secret for the server' under User & Authentication -> RADIUS Servers -> Edit the name.

 

FortiAuthenticator.png

 

Run debug in FortiGate with the command 'diagnose debug application fnbamd 255', it shows 'No Message Authenticator'.

 

message authenticator.png

 

Verify the FortiAuthenticator firmware version whether is v6.4.9, v6.5.5, v6.6.1 or older. If firmware v6.4.9, v6.5.5, v6.6.1 or older, then it is necessary to upgrade to version 6.4.10, 6.5.6, or 6.6.2 which will fix the issue.

 

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