[squid-users] Simple Kerberos/Squid configuration "received type 1 NTLM token"

Hi,

I have a simple configuration of Squid, with a acl to deny access to users
that aren't authenticated. I have setup kerberos correctly as the squid
server ask tickets. There is no AD, just a kerberos server, squid server and
Windows XP clients. The Windows client uses Network Identity Manager (MIT)
to create a ticket.

I could not find a solution in the mailing list archives and other places on
the internet.

When I use the proxy with Firefox (3.6.10, laterst version, same on IE), I
get:

ERROR
Cache Access Denied

While trying to retrieve the URL: http://dd/

The following error was encountered:

    * Cache Access Denied.

Sorry, you are not currently allowed to request:

    http://dd/

from this cache until you have authenticated yourself.

A keytab file for the proxy exists (squid.keytab) and squid has read access
to it. This file is created using "addprinc -randkey squid/MYNETWORK.COM"

I added in the top of the /etc/init.d/squid file the following:

KRB5_KTNAME=/etc/squid/squid.keyab
export KRB5_KTNAME

The squid configuration is as following:

uth_param negotiate program /usr/lib/squid/squid_kerb_auth -d
auth_param negotiate children 10
auth_param negotiate keep_alive on
acl all src 0.0.0.0/0.0.0.0
acl manager proto cache_object
acl localhost src 127.0.0.1/255.255.255.255
acl to_localhost dst 127.0.0.0/8
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
acl password proxy_auth REQUIRED
http_access allow manager localhost
http_access deny manager
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access allow password
http_access deny all
icp_access allow all
http_port 3128
hierarchy_stoplist cgi-bin ?
access_log /var/log/squid/access.log squid
acl QUERY urlpath_regex cgi-bin \?
cache deny QUERY
refresh_pattern ^ftp: 1440 20% 10080
refresh_pattern ^gopher: 1440 0% 1440
refresh_pattern . 0 20% 4320
acl apache rep_header Server ^Apache
broken_vary_encoding allow apache
cache_mgr root_at_localhost
coredump_dir /var/spool/squid

When accessing squid from Firefox/IE, I get in cache.log:

2010/09/21 11:41:12| squid_kerb_auth: Got 'YR
ElRMTVNTUABBAAAAB4IIogAAAAAAAAAAAAAAAAAAAAAFASgDAAAADw==' from squid
(length: 59).
2010/09/21 11:41:12| squid_kerb_auth: parseNegTokenInit failed with rc=101
2010/09/21 11:41:12| squid_kerb_auth: received type 1 NTLM token

It is strange that the proxy receives NTLM messages, as it is not
configured. What is wrong.

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