SSLVPN, 2 Factor Authentication via SMS and RADIUS

Hello everybody

I am using RADIUS for authenticating my SSLVPN clients, everything is working fine.

I now have a new requirement for 2 factor authentication via sms. I have tested this with local fortigate users, it works fine. However, I can't get this working with RADIUS. I assume that RADIUS doesn't deliver the mobile phone number of the account, which means fortigate can't send an SMS to an unknown mobile number.

Creating local users (including mobile number) is no option for me.

Has anyone got a solution or workaround for this problem?

Best regards

Dieter Braitsch