# External SSO based MFA

{% hint style="warning" %}
Since [version 1.5.0 ](/1.5/features/wireguard/multi-factor-authentication-mfa-2fa.md)we support MFA based on external OIDC/SSO.
{% endhint %}

You can use [Internal OIDC/SSO](/1.4/features/openid-connect.md) - called [Internal MFA ](#internal-mfa)- to force Desktop & Mobile clients to authenticate with **TOTP & Email codes** and after that with **session keys based on WireGuard Pre-Shared Keys** (PSK). For more details about this, please refer to the [architecture section](/1.4/in-depth/architecture/architecture.md).


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