Hi there, I've setup NTLM authentication on my fedora box a few times before and it all went off without a problem, seamless authentication, it was great. But now I'm trying to get it done on a RHEL 4 box and it's not going so well, I've got samba authenticating against my Active directory [root@rhel4 /]# wbinfo -t checking the trust secret via RPC calls succeeded but when I use my MSIE browser when I'm logged into the domain I get a username/password prompt. I want it to be able to do it on the background, any suggestions? I've read just about everything there is to read on the net. Here is my what I have added to my squid.conf auth_param basic children 5 auth_param basic realm Squid proxy-caching web server auth_param basic credentialsttl 2 hour auth_param basic casesensitive off auth_param basic program /usr/bin/ntlm_auth --helper-protocol=squid-2.5-basic auth_param ntlm program /usr/bin/ntlm_auth --helper-protocol=squid-2.5-ntlmssp auth_param ntlm children 30 auth_param ntlm max_challenge_reuses 0 auth_param ntlm max_challenge_lifetime 2 hour acl ntlm proxy_auth REQUIRED http_access allow ntlm I don't have one http_access rule and that's to allow the ntlm users threw. Any suggestions?