Hi, I'm trying to get NTLM pass through to work with squid 3.1.19. I have followed the instructions found on the wiki[1] on connection pinning but I just keep receiving 401 status messages. Below is the very simple squid.conf that I'm using for this test. acl manager proto cache_object acl localhost src 127.0.0.1/32 ::1 acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 ::1 acl localnet src 192.168.0.0/16 # RFC1918 possible internal network acl SSL_ports port 443 acl Safe_ports port 80 # http acl Safe_ports port 21 # ftp acl Safe_ports port 443 # https acl Safe_ports port 70 # gopher acl Safe_ports port 210 # wais acl Safe_ports port 1025-65535 # unregistered ports acl Safe_ports port 280 # http-mgmt acl Safe_ports port 488 # gss-http acl Safe_ports port 591 # filemaker acl Safe_ports port 777 # multiling http acl CONNECT method CONNECT http_access allow manager localhost http_access deny manager http_access deny !Safe_ports http_access deny CONNECT !SSL_ports http_access allow localnet http_access allow localhost http_access deny all http_port 8080 connection-auth=on hierarchy_stoplist cgi-bin ? coredump_dir /var/cache/squid refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern -i (/cgi-bin/|\?) 0 0% 0 refresh_pattern . 0 20% 4320 And below is the corresponding access.log entries with obfuscated ip addresses and host names. 1337976537.852 63 192.168.12.214 TCP_MISS/401 466 GET http://www.example.net/directory/ - DIRECT/x.x.x.x text/html 1337976550.714 29 192.168.12.214 TCP_MISS/401 1074 GET http://www.example.net/directory/ - DIRECT/x.x.x.x text/html 1337976551.025 57 192.168.12.214 TCP_MISS/401 466 GET http://www.example.net/directory/ - DIRECT/x.x.x.x text/html 1337976554.627 57 192.168.12.214 TCP_MISS/401 1074 GET http://www.example.net/directory/ - DIRECT/x.x.x.x text/html 1337976558.006 3128 192.168.12.214 TCP_MISS/401 466 GET http://www.example.net/directory/ - DIRECT/x.x.x.x text/html 1337976559.462 59 192.168.12.214 TCP_MISS/401 1074 GET http://www.example.net/directory/ - DIRECT/x.x.x.x text/html 1337976559.760 56 192.168.12.214 TCP_MISS/401 466 GET http://www.example.net/directory/ - DIRECT/x.x.x.x text/html I feel like I'm missing something obvious since the instructions on the wiki are quite simple. When I try the same website through a v2.7 squid it lets me login. Let me know if any other information is needed. Any help would be very much appreciated. Regards, /petter [1] http://wiki.squid-cache.org/Features/ConnPin