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Umesh
Umesh
Explorer II
February 18, 2026
Question

Unable to authenticate with Radius server

  • February 18, 2026
  • 1 reply
  • 158 views

Hi there,

 

I have configured Radius server in window server to authenticate Firewall user so that users can manage Firewall.

 

Radius server is accessible from Fortigate Firewall and user is also reachable when I test from FortiGate test connectivity.

 

But when I do ssh or access GUI to access the firewall by entering username and password showing incorrect password.

 

Please need your suggest what I am missing.

 

admin user to manage firewall.jpgRadius Group at Firewall.jpgRadius server is reachable from fortigate.jpgRadius user is also reachable from fortigate.jpgUser faild to login .jpg

 

 

Even after entering correct username & password which configured at Radius server is not able to login.

 

 

Thanks for your attention on this problem

1 reply

Markus_M
Staff & Editor
Markus_M
Staff & Editor
February 18, 2026

You should also match "ALL" users on the remote server, not a single server.


You may also be missing the VSA for the administrator profile. This should not cause a failure, but the profile should for best practice be "no access" whereas the profile "Umesh" should be sent by the server, similarly to the "Fortinet-Group-Name".

An example with NPS (even this is FortiAnalyzer):
https://community.fortinet.com/t5/FortiAnalyzer/Technical-Tip-FortiManager-FortiAnalyzer-Windows-NPS-RADIUS/ta-p/197855

and the FortiGate config bits are here:

https://community.fortinet.com/t5/FortiAuthenticator/Technical-Tip-Remote-admin-login-with-RADIUS-selecting-admin/ta-p/192308

 

    Umesh
    UmeshAuthor
    Explorer II
    February 19, 2026

    Hi Markus,

     

    Does Fortigate Free evolution  license support Radius authentication for Admin profile.

     

    Thanks 

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