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Re: acl proxy_auth problem

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Georg Roelli wrote:
----------------------------------------
Date: Thu, 3 Dec 2009 10:36:10 +1300
From: squid3@xxxxxxxxxxxxx
To: squid-users@xxxxxxxxxxxxxxx
Subject: Re:  acl proxy_auth problem

On Wed, 2 Dec 2009 15:15:15 +0100, Georg Roelli wrote:
Hello

My environment: Ubuntu 8.04 LTS, Squid 2.6.18, Samba 3.0.28a

I am looking to find a way to check with an acl if a user is member of a
specific ad-group. On my Squid Proxy Server, I have successfully set up
an
SSO authentication with the active directory.
This works fine. Among other things:

auth_param ntlm program /usr/bin/ntlm_auth
--helper-protocol=squid-2.5-ntlmssp
--require-membership-of="Domäne\\AD-GroupeA"

Now I start with the definition of the acl's. At first I would like to
make a badUrls list which is valid for all users to block some sites.
This
list should not be applied to a group of personal computers (host)
and/or a
specific AD group.
Here is my approach:

acl auth proxy_auth REQUIRED
acl badurls url_regex "/data/squid/badurls.txt"
acl AllowedClients srcdom_regex -i "/data/squid/allowed_clients.txt"
acl AllowedGroups proxy_auth -i Domäne/AD-GroupeB

http_access allow auth AllowedClients
http_access allow auth AllowedGroups
http_access deny badurls
http_access allow auth
http_access deny all

The acl with the badurls list and the acl for the AllowedClients are
working fine. But with the acl acl AllowedGroups proxy_auth -i
Domäne/AD-GruppeB I have great problems. I don't know how I can make an
acl
who check the membership from an AD-Groupe.
I tested many different types of spelling. Unfortunately without
success.
How can I make an acl using ntlm_auth authentication? Is there a better
and
easier way to do this?

Thank you for your suggestions.

Kind regards.



http://wiki.squid-cache.org/ConfigExamples/Authenticate/NtlmWithGroups

Amos

Hello Amos
Thank you for your note. I have try it and after a have modified the lines in external_acl_type testForNTGroup %LOGIN /usr/lib/squid/wbinfo_group.pl -d
acl inGroupX external testForNTGroup obmg
http_access allow inGroupX
I can restart the squid service without problems. Unfortunately the alc does not work.
In a documentation I have found the -d option for wbinfo_group.pl and now I find these messages in the access.log:

You means cache.log surely?

[2009/12/03 13:18:16, 3] libsmb/ntlmssp.c:debug_ntlmssp_flags(63)
  Got NTLMSSP neg_flags=0xa2088205
Got wag obmg from squid
Could not convert sid S-1-5-21-986273330-1409306274-1541874228-6339 to gid
User:  -rog-
Group: -obmg-
SID:   -S-1-5-21-986273330-1409306274-1541874228-6339-
GID:   --
Sending ERR to squid
Do you have any other ideas what dies message exactly means?

They means the user "rog" exists but was not a registered member of group "obmg".

Look in the registry (I think on the domain controller) for "S-1-5-21-986273330-1409306274-1541874228-6339" and see what groups it's a member of.

Amos
--
Please be using
  Current Stable Squid 2.7.STABLE7 or 3.0.STABLE20
  Current Beta Squid 3.1.0.15

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