How to Configure Two-Factor Authentication using Duo RADIUS

You can configure the Duo RADIUS server as the primary authentication source. This approach uses the Duo RADIUS Authentication Proxy.

You would then configure Duo to forward authentication requests directed to the proxy server to use another RADIUS server, or an AD server, as the first authentication factor, and the Duo Cloud Service as the second factor.

The following topics explain the configuration in more detail:

• System Flow for Duo RADIUS Secondary Authentication

• Configure Device for Duo RADIUS Using CDO