Accessing phpmyadmin and roundcube via domain name

Hi guys...

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

Let say my domain name is domain1.com. When i install some features like phpmyadmin and roundcube from the install scripts, these features are easily accessible like "domain1.com/roundcube" or "domain1.com/phpmyadmin" 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 web panel and access these both scripts or these are the only way to access the phpmyadmin and roundcube?

Thanks.