Hi! I'm following the guide here http://wiki.squid-cache.org/ConfigExamples/Authenticate/WindowsActiveDirectory ...to get Negotiate authentication working with Squid 3.2.1. NTLM works fine but I when using Negotiate I am getting this in my cache.log... 2012/08/17 17:31:01 kid1| ERROR: Negotiate Authentication validating user. Error returned 'BH gss_accept_sec_context() failed: Unspecified GSS failure. Minor code may provide more information. ' "kinit -V -kt /etc/squid/HTTP.keytab HTTP/proxy01.domain.local" produces... Using default cache: /tmp/krb5cc_0 Using principal: HTTP/proxy01.domain.local@DOMAIN.LOCAL Using keytab: /etc/squid/HTTP.keytab kinit: Preauthentication failed while getting initial credentials "klist -ekt /etc/squid/HTTP.keytab" produces... Keytab name: WRFILE:/etc/squid/HTTP.keytab KVNO Timestamp Principal ---- ----------------- -------------------------------------------------------- 2 08/17/12 17:18:03 proxy01-h$@DOMAIN.LOCAL (arcfour-hmac) 2 08/17/12 17:18:04 proxy01-h$@DOMAIN.LOCAL (aes128-cts-hmac-sha1-96) 2 08/17/12 17:18:04 proxy01-h$@DOMAIN.LOCAL (aes256-cts-hmac-sha1-96) 2 08/17/12 17:18:04 HTTP/proxy01.domain.local@DOMAIN.LOCAL (arcfour-hmac) 2 08/17/12 17:18:04 HTTP/proxy01.domain.local@DOMAIN.LOCAL (aes128-cts-hmac-sha1-96) 2 08/17/12 17:18:04 HTTP/proxy01.domain.local@DOMAIN.LOCAL (aes256-cts-hmac-sha1-96) 3 08/17/12 17:18:57 proxy01-h$@DOMAIN.LOCAL (arcfour-hmac) 3 08/17/12 17:18:57 proxy01-h$@DOMAIN.LOCAL (aes128-cts-hmac-sha1-96) 2 08/17/12 17:18:04 host/proxy01.domain.local@DOMAIN.LOCAL (arcfour-hmac) 3 08/17/12 17:18:57 proxy01-h$@DOMAIN.LOCAL (aes256-cts-hmac-sha1-96) 2 08/17/12 17:18:04 host/proxy01.domain.local@DOMAIN.LOCAL (aes128-cts-hmac-sha1-96) 2 08/17/12 17:18:04 host/proxy01.domain.local@DOMAIN.LOCAL (aes256-cts-hmac-sha1-96) auth_params are... auth_param negotiate program /usr/lib/squid/negotiate_kerb_auth auth_param negotiate children 30 startup=10 idle=5 auth_param negotiate keep_alive on Can anyone help? I'm guessing I've not done something rather important? Thank you. Paul