Troubleshooting Tip: Dialup IPsec VPN with FortiToken fails to connect

[pginete]

Description	This article describes how to fix a dial-up IPsec VPN with FortiToken fails to connect.
Scope	FortiGate, FortiAuthenticator.
Solution	The user cannot connect to dial-up IPsec VPN with FortiToken and encountered ‘FortiClient Wrong Credentials EAP failed connecting’ error. While successful when connecting without FortiToken. The setup is dial-up IPsec VPN IKEv2 using RADIUS authentication, where FortiGate is the RADIUS client while the FortiAuthenticator is the RADIUS server. Enable ‘Allow OTP for EAP-MSCHAPv2 Authentication with FortiClient’ on the RADIUS Service policy of FortiGate on the FortiAuthenticator to fix it. MSCHAP2 is a prerequisite of this setup.  Related articles: Technical Tip: Authenticating users using MSCHAP2 PEAP Technical Tip: Joining FortiAuthenticator in the active directory as a machine entity