Two factor authentication for vCloud director provider URL

Hi Team,

I have a doubt on "Two factor authentication for vCloud director provider URL"

Right now,my provider URL also accessible from public internet "https://mycloud.com/cloud"(via system administrator) and like to secure the URL using some third party security like "DUO security"

Do we have any Duo guide to setup this with vCloud director ?   or any other ways available to secure from vCloud director(Federation) ?

Please suggest the bet possible options to secure this.

Thanks,

Manivel RR