Hi Amos, I tried your auth method : auth_param ntlm program /usr/bin/ntlm_auth --helper-protocol=squid-2.5-ntlmssp auth_param ntlm max_challenge_reuses 0 auth_param ntlm max_challenge_lifetime 2 minutes auth_param ntlm children 10 auth_param ntlm realm Authentification Squid auth_param basic program /usr/bin/ntlm_auth --helper-protocol=squid-2.5-basic auth_param basic credentialsttl 1 hours auth_param basic children 5 auth_param basic realm Authentification Squid But I still have the same error message while starting Squid : 2009/09/04 11:31:36| Processing Configuration File: /etc/squid/squid.conf (depth 0) 2009/09/04 11:31:36| Can't use proxy auth because no authentication schemes are fully configured. FATAL: ERROR: Invalid ACL: acl SSO proxy_auth REQUIRED Squid Cache (Version 3.0.STABLE16): Terminated abnormally. CPU Usage: 0.023 seconds = 0.005 user + 0.018 sys Maximum Resident Size: 0 KB Page faults with physical i/o: 0 ----- -----Message d'origine----- De : Amos Jeffries [mailto:squid3@xxxxxxxxxxxxx] Envoyé : vendredi 4 septembre 2009 10:18 À : Pierre Thomas Cc : squid-users@xxxxxxxxxxxxxxx Objet : Re: Authentication through Squid3 Pierre Thomas wrote: > Hi, > > I set up a Squid3 Proxy on my Centos 5.3 box, and it works properly since I try to setup authentication on my Active Directory. > > Here is an extract of my squid.conf, inspired of my old squid 2.7 configuration : > ______________________________________________________________________ > auth_param ntlm program /usr/bin/ntlm_auth --helper-protocol=squid-2.5-ntlmssp > auth_param ntlm max_challenge_reuses 0 > auth_param ntlm max_challenge_lifetime 2 minutes > auth_param ntlm children 10 > auth_param ntlm realm Authentification Squid > > auth_param basic program /usr/bin/ntlm_auth --helper-protocol=squid-2.5-ntlmssp I would expect that to use a different parameter. Basic being a different methods of auth. --helper-protocol=squid-2.5-basic is probably what you wanted there. > auth_param basic credentialsttl 1 hours > auth_param basic children 5 > auth_param basic realm Authentification Squid > > acl SSO proxy_auth REQUIRED > http_access allow SSO > _______________________________________________________________________ > > When I try to start the proxy service, I obtain this error message : > > > [root@localhost mnt]# service squid start > 2009/09/04 09:17:51| Processing Configuration File: /etc/squid/squid.conf (depth 0) > 2009/09/04 09:17:51| Can't use proxy auth because no authentication schemes are fully configured. > FATAL: ERROR: Invalid ACL: acl SSO proxy_auth REQUIRED > > Squid Cache (Version 3.0.STABLE16): Terminated abnormally. > CPU Usage: 0.011 seconds = 0.003 user + 0.008 sys > Maximum Resident Size: 0 KB > Page faults with physical i/o: 0 > > Any idea to help ? > > Regards > Strange. Is thats the entire exact squid.conf? And what does "squid -v" produce? Amos -- Please be using Current Stable Squid 2.7.STABLE6 or 3.0.STABLE18 Current Beta Squid 3.1.0.13