Hello everyone I'm working with squid and I have some idea that may be useful or not. Squid ntlm authenticated proxy against samba. Samba with ldap storage synchronized with a windows active directory ldap db. It might sound a somewhat like a merry-go-round, but this way, authentication may not depend exclusively on a link between a domain server and samba. Although, it could do authentication for multiple domains if I'm right. Well, I'll wait for comments on this idea and begin testing as soon as I get some spare time. Cheers people.