Several months ago, I covered how to add two-factor authentication (2FA) to FreeRADIUS using Google Authenticator. Today, I will cover the TACACS+ version of it.
I’ve written a blog post on how to build tac_plus server using Ubuntu. The guide was written in 2011, while it’s an old blog post, the instructions are still valid using Ubuntu Server 16.04. Please use that guide on how to build one, then use this guide to add multi-factor authentication (MFA) to TACACS+.