Restriting access by IP


hi there…
long time with no post in here…
let see if one of you guys can help me.

I want to install zenphoto on DH.
I would like for it to allow access to our office locations by domain or IP.
IF possible, every other user should autenticate even before getting to the site. Even better, if it could autenticate against our LDAP server, so our users could see the gallery when on the road or at home.

Can .htaccess do this? Do I need to do anything on apache? Who can I do that?

Thanks in advance, and good Easter Holiday.

BUGabundo :o)
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