Hi,

I have understood that you used EAP-AKA for UE authentication. I am not able to find EAP-AKA as mutual authenticator in ePDG standard. Can you please refer the clause where you get this point to use EAP-AKA as mutual authenticator between UE and ePDG.

Also in the template swanctl.conf you have use EAP-AKA in both local and remote side. Whereas for epdg you have written a new auth method EAP-EPDG, right?

That means when UE sends packet ePDG will invoke its EPDG code inside strongswan and then extract UE's EAP identity and sends to AAA for authentication.

Here UE is getting authenticated not the ePDG.

Is my understanding correct?

Thanks