[squid-users] Squid/NTLM Auth

Keith White keith.white at emdmillipore.com
Wed Oct 21 19:21:45 UTC 2015

I have squid running on Centos 7 and am trying to setup AD authentication.  I have samba/winbindd installed and the system was added to the domain with authconfig.  I have tested authentication with auth_ntlm and that works. I have also tested group membership with auth_ntlm and that works as well.  When attempting to access squid with either IE or Firefox I am presented with the authentication dialog box.  Manually entering credentials does not work.  What debugging can I enable to see what is going on?  Squid is built with the following

Squid Cache: Version 3.5.9-20150917-r13917
Service Name: squid
configure options:  '--prefix=/usr' '--includedir=/usr/include' '--datadir=/usr/share' '--bindir=/usr/sbin' '--libexecdir=/usr/lib/squid' '--localstatedir=/varsquid' '--sysconfdir=/etc/squid' '--enable-auth' '--enable-auth-ntlm' '--enable-external-acl-helpers' '--enable-auth-negotiate' '--enable-auth-basic' '--enable-auth-digest'

relevant section from squid.conf

auth_param ntlm program /usr/bin/ntlm_auth --diagnostics --helper-protocol=squid-2.5-ntlmssp
auth_param ntlm children 5
auth_param ntlm keep_alive on
auth_param basic program /usr/bin/ntlm_auth --diagnostics --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 AuthorizedUsers proxy_auth REQUIRED
http_access allow localnet
http_access allow AuthorizedUsers
http_access allow localhost



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