What do you mean they can view it? They can see the login screen? They can login and do actions in there? I can go to the modcp and admincp of the site in your sig because you haven't changed the directory names and have left them default. But, I can't actually login.
We recommend you follow the tips in this thread regarding securing your board -
https://www.vbulletin.com/forum/show...ms-More-Secure