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FortiGate IPSec RAVPN, Cisco ISE and Cisco DUO

Ib_Reda
Level 1
Level 1

Hello
I have FG as internet FW, and We have SSL RAVPN with radius server Cisco ISE and MFA cisco DUO.

Now we migrated from SSL to RAVPN IPSec, I tested with ISE, it working normally but when use Cisco DUO I have an issue as below:  

Event 5400    Authentication failed Failure Reason 11509 Allowed Protocols does not allow any EAP protocols Resolution In the Allowed Protocols verify that the required EAP-based protocol is enabled. Root cause EAP-negotiation failed because the Allowed Protocols has no EAP-based protocols enabled.

Although I checked the allowed protocol, and it enabled , any feedback, please?Screenshot 2025-05-14 at 14.03.18.png

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