Hi, I was successful in running ntlm_auth. (kerberos - OK, samba - OK) with the following config on my squid.conf auth_param ntlm program /usr/local/samba/bin/ntlm_auth --helper-protocol=squid-2.5-ntlmssp auth_param ntlm children 5 auth_param ntlm max_challenge_reuses 0 auth_param ntlm max_challenge_lifetime 2 minutes auth_param ntlm use_ntlm_negotiate off auth_param basic program /usr/local/samba/bin/ntlm_auth --helper-protocol=squid-2.5-basic auth_param basic children 5 auth_param basic realm Squid Proxy auth_param basic credentialsttl 5 hours acl ntlm proxy_auth REQUIRED http_access allow ntlm I can run Squid by issuing "squid -D" but it will still display the following error, and continue to run squid. 2009/07/01 18:37:14| AuthNTLMConfig::parse: unrecognised ntlm auth scheme parameter 'max_challenge_reuses' 2009/07/01 18:37:14| AuthNTLMConfig::parse: unrecognised ntlm auth scheme parameter 'max_challenge_lifetime' 2009/07/01 18:37:14| AuthNTLMConfig::parse: unrecognised ntlm auth scheme parameter 'use_ntlm_negotiate' any help would be awesomely appreciated. -b -- () ascii ribbon campaign - against html e-mail /\ www.asciiribbon.org - against proprietary attachments