Accessing phpmyadmin and roundcube

Hi guys…

I have installed ubuntu server and virtualmin web panel and everything working fine.

Let say my domain name is
When i install some features like phpmyadmin and roundcube from the install scripts,
these features are easily accessible like “” or “” which i think are less secured.

Are there any other way to access phpmyadmin and roundcube for example like the user must log in into the virtualmin and access these both scripts ?