>Sorry for the silly question, I've been using squid to allow access to users >on a domain, but how can I limit access to users only in a certain security >group on the domain. Check the wiki out. Once they are in a group, you specify group access in the ntlm_auth helper something like this: auth_param ntlm program /usr/bin/ntlm_auth --helper-protocol=squid-2.5-ntlmssp --require-membership-of=EXAMPLE+ADGROUP The group syntax should correlate to your winbind separator defined in your smb.conf.