Squid-kerberos

• http://roshan-g.blogspot.de/2014/05/squid-with-kerberos-and-ldap.html
• http://wiki.squid-cache.org/ConfigExamples/Authenticate/WindowsActiveDirectory
• http://stackoverflow.com/questions/18075028/squid-integration-with-active-directory-best-practise
• http://manpages.ubuntu.com/manpages/trusty/man8/negotiate_kerberos_auth.8.html