RE: [squid-users] deny access with squid_ldap_group

>
>> Hello,
>>
>> I am trying to block Internet access for people member of one
specific
>> AD Security group called GSIFBENoInternetAccess but I get some issue
>> with it.
>>
>> When I try the squid_ldap_group process from shell, the mechanism is
>> working well. my service account correctly requests our Active
Directory
>> and gives the right response ERR/OK.
>>
>> When I try this mechanism from squid process, allow/deny is working
well
>> but before being blocked by squid_ldap_group I also receive an
>> authentication popup box .. I simply press on CANCEL and receives the
>> personalized error page.
>>
>>
>> I have read on the net this may come from multiple authentication but
I
>> do not see this in my case and if this is the case thks to explain me
>> what's wrong with this .. Is this coming from the line with ntlmauth
>> just afterwards and how is this this possible to make this working
>> without the authentication box ??
>
>Yes it is.
>
>>
>> # my config
>>
>> ...
>> auth_param ntlm program /usr/local/bin/ntlm_auth
>> --helper-protocol=squid-2.5-ntlmssp
>> auth_param ntlm children 32
>> auth_param ntlm keep_alive on
>> acl ntlmauth proxy_auth REQUIRED
>> ...
>> external_acl_type gg_nointernet ttl=3600 children=8 %LOGIN
>> /usr/local/bin/squid_ldap_group ... -p 389 -P -t 2 -c 3 -R -S +
>> acl GSIFBENoInternetAccess external gg_nointernet
GSIFBENoInternetAccess
>> ...
>
>Replace this:
>
>> http_access deny GSIFBENoInternetAccess
>> deny_info ERR_LDAP GSIFBENoInternetAccess
>
>with this:
>
> # maybe needed to force credentials to be present
> #
> http_access deny !ntlmauth
>
> # do the group checking and custom denial page
> # without another auth popup.
> #
> acl ldapErrPage src all
> deny_info ERR_LDAP ldapErrPage
> http_access deny GSIFBENoInternetAccess ldapErrPage
>
>
>> http_access allow ntlmauth
>> http_reply_access allow all
>> http_access deny all

first of all many thks for the quick reply ..

I tried your proposal and seems to work. I still have to check
everything is ok at ldap and ntlm level but seems well until now ..
about your config there is something I do not understand ..

when I look at what I tried before, I deny all member of group
GSIFBENoInternetAccess before requesting for authentication so afaik
processing stops after the first line .. Is this correct and do I say
something wrong with this ??

http_access deny GSIFBENoInternetAccess
http_access allow ntlmauth
http_reply_access allow all
http_access deny all

when I look at your proposal what I understand, client is first
requested with authentication (407), then you simply define an acl
matching everything, you deny all member of GSIFBENoInternetAccess for
everybody (ldapErrPage is matching in this case 0.0.0.0/0.0.0.0) and
last but not least but this part is not clear for me, you request
credentials for the second time

http_access deny !ntlmauth
acl ldapErrPage src all
deny_info ERR_LDAP ldapErrPage
http_access deny GSIFBENoInternetAccess ldapErrPage
http_access allow ntlmauth
http_reply_access allow all
http_access deny all

in other words ....

why did you force authentication before and after the ldap group ?
I see two times ntlmauth so you should authenticate two times for the
same request, right ?
why did you define an acl called ldapErrPage, without ldapErrPage is not
enough ?

many thks for your answers.

>>
>>
>> many thks to help me.
>> Vincent.
>
>Amos
>--
>Please be using
> Current Stable Squid 2.7.STABLE6 or 3.0.STABLE19
> Current Beta Squid 3.1.0.13
>
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Received on Thu Sep 17 2009 - 20:09:47 MDT