Hi all, I have setup NTLM authentication with squid-2.6.STABLE20, samba-3.0.10 and winbind. My purpose is to find the username in both squid and DG access log which I am getting fine. But the problem is sometimes not frequest IE prompts a pop up window for authentication and if not given i.e., pressed cancel then it gives a message like " Cache access denied". But if you then press Refresh button then it loads again fine. But if you provide the username and password at the login prompt it also works though. My question is how to STOP this password prompting pop up window. Below is the output of /var/log/squid/cache.log when the password window prompts [2008/09/29 13:39:11, 3] utils/ntlm_auth.c:winbind_pw_check(427) Login for user [XYZ][testuser]@[PC21] failed due to [Reading winbind reply failed!] 2008/09/29 13:39:11| The request GET http://search.live.com/LS/GLinkPing.aspx?/_1_9SE...... Below is my NTLM part of squid.conf file auth_param ntlm program /usr/bin/ntlm_auth --helper-protocol=squid-2.5-ntlmssp auth_param ntlm children 30 auth_param ntlm keep_alive on auth_param basic program /usr/bin/ntlm_auth --helper-protocol=squid-2.5-basic auth_param basic children 5 auth_param basic realm Squid proxy-caching web server auth_param basic credentialsttl 2 hours ..... ....... acl manager proto cache_object acl authenticated_users proxy_auth REQUIRED acl localhost src 127.0.0.1/255.255.255.255 acl to_localhost dst 127.0.0.0/8 ... ..... #Recommended minimum configuration: # # Only allow cachemgr access from localhost ##http_access deny !Safe_ports http_access allow manager localhost http_access deny manager # Deny requests to unknown ports #http_access deny !Safe_ports # Deny CONNECT to other than SSL ports http_access deny CONNECT !SSL_ports http_access allow authenticated_users # cat /etc/nsswitch.conf passwd: compat winbind group: compat winbind shadow: compat hosts: files dns wins networks: files dns protocols: db files services: db files ethers: db files rpc: db files # cat /etc/krb5.conf [logging] default = FILE:/var/log/krb5libs.log kdc = FILE:/var/log/krb5kdc.log admin_server = FILE:/var/log/kadmind.log [libdefaults] default_realm = DOMAIN.COM [realms] DOMAIN.COM = { default_domain = DOMAIN.COM kdc = abc.domain.com kdc = efg.domain.com kdc = xx.xx.xx.xx kdc = xx.xx.xx.xx } [domain_realm] .kerberos.server = DOMAIN.COM