I've googled around a bit and see things about using the ntlm_auth -b option, but I don't understand how/where? Problem: I have squid setup to do NTLM aunthetication of the proxy users against a local domain controller (samba/winbind installed on the proxy server), pretty straight forward. If the domain controller goes down or gets rebooted, the proxy users start getting popups to authenticate. I typically restart the winbind service when this happens once the DC comes back up. How can I setup squid, or samba/winbind so that when one DC goes down it uses the backup DC? - Nick