hi Tom, I had a little bit the same problem as yuo last week. I am only used the basis authentifaction for the clients. I got a good help from Serassio Guido about this topic . He wrote: You can find a Window build of NCSA tools in the Squid for Windows download page. http://www.acmeconsulting.it/SquidNT.html Her are some information about the basic authenfication: -> You need a passwd-file for the basic authenfication. -> You must write the username and the password with the programm htpasswd.exe in this file (you will find the programm at the side http://www.acmeconsulting.it/SquidNT.html) -> You must write the filename and the name of path file the passwd into the Sqiud.conf. For example: auth_param basic program /squid/libexec/ncsa_auth.exe /squid/etc/passwd -> I started the process auth_param.exe separat after I have started the squid proxy After that it works fine. Best regards Clemens From: "Tom Cannaerts" <t.cannaerts@xxxxxxx> on 20.06.2005 09:28 ZE2 To: <squid-users@xxxxxxxxxxxxxxx> cc: Subject: Problem setting up SquidNT and NT Authentication Hi, I'm new to Squid, and I can't seem to solve this problem (probably overlooking something) I'm using SquidNT running on a Windows Server 2003 Active Directory controller, and want to restrict access to a specific Windows user group (InternetUsers). What happens is that I always get a permission denied page, and the browser does not prompt me for a username/password (tried both IE and FireFox). I found a linux example on how this should be done (using a perl script), and changed it to use the exe files supplied with SquidNT, but it ain't working. Here are the relevant lines of my squid.conf auth_param ntlm program c:/squid/libexec/win32_ntlm_auth.exe 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 c:/squid/libexec/NT_auth.exe auth_param basic children 5 auth_param basic realm Squid proxy-caching web server auth_param basic credentialsttl 2 hours auth_param basic casesensitive off external_acl_type NT_local_group %LOGIN c:/squid/libexec/win32_check_group.exe acl LProxyUsers external NT_local_group InternetUsers acl password proxy_auth REQUIRED http_access allow password LProxyUsers http_access deny all If anyone has done something similar, or simply knows how this must be done, please help me out. Greetings, Tom