Front page single auth for whole site

[deus83]

I was wondering if it was possible to get somekind of member authentication, so that unwelcome people cant access the site what so ever. As in, first thing they see if a blackscreen with name of site, and then user//pass they need to fill in, if it aint filled in, they get moved to.... some page that tells them its restricted access...

If they DO enter the user / pass, they get into VB forum, where they can login with their own account. So the first account is for all members to use. Any idea if this is possible to find somewhere ?

Sorry if its placed in the wrong section, dunno where else to post it.

Thanks in advance.