Hi! I've successfully configured squid to use ntlm authentication. If the authenticated users go through the proxy, the web page will be loaded. In the opposite side, if any unauthorized users want to browse, popup window appears (username, password). I know is the default behaviour. Is there any chance to not to popup authentication window in this case? auth_param ntlm program /usr/bin/ntlm_auth --helper-protocol=squid-2.5-ntlmssp --require-membership-of=S-1-5-21-298725999-1398125-441284377-12796 auth_param ntlm children 100 auth_param ntlm max_challenge_reuses 100 auth_param ntlm max_challenge_lifetime 5 minutes auth_param basic program /usr/bin/ntlm_auth --helper-protocol=squid-2.5-basic --require-membership-of=S-1-5-21-298725999-1398125-441284377-12796 auth_param basic children 100 auth_param basic realm Kerem adja meg felhasznalonevet es jelszavat auth_param basic credentialsttl 1 hours acl AuthorizedUsers proxy_auth REQUIRED http_access allow AuthorizedUsers http_access deny all Thanks in advance, Szabolcs Horvath