Re: [squid-users] Reverse Proxy, OWA RPCoHTTPS and NTLM authentication passthrough

Abdessamad BARAKAT wrote:
>
> Hi people,
>
> Nobody for give me a feedback about this feature ( ntlm auth pass
> through) ?

You know as much about this as most here. It don't work.

I'm no expert myself but I suspect the reason goes something like this:
(wild guess)
   NTLM is a sub-band authentication in background channels directly
between the server and client. Now client thinks the reverse-proxy IS
the server so is happy to authenticate with it. Squid is possibly able
to pass the login details back to exchange, which required NTLM with the
client. Client goes, hang on a minute I wasn't talking to you, and kills
the auth. Squid does not have the client-stored secret information to
setup a fake NTLM sequence to exchange on behalf of the username/pass it
knows.

As I said, I'm no expert, but it seems to me that is likely what the
issue is. If I'm wrong can someone please indicate why such an old and
popular item as NTLM re-auth has not been implemented in _any_ version
of Squid yet?

Amos

>
> Thanks
>
>
> Le 14 juil. 08 à 12:39, Abdessamad BARAKAT a écrit :
>
>> Hi,
>>
>> I need to reverse proxied a OWA 2007 service and I have some problems
>> with NTLM authentication and the RPC connection. Squid offers a SSL
>> service and connect himself to the OWA with a SSL connection
>>
>> The NTLM authentication was made bu the OWA so I need squid to pass
>> the credentials without modified them.
>>
>> Actually I get only 401 error code but when I switch the
>> authentication to "Basic authentication" on the Outlook anywhere's
>> settings, It's working. I want really to have the NTLM authentication
>> working for don't ask all users to change their settings.
>>
>> The squid is chrooted.
>>
>> I have tried the following versions:
>>
>> - 3.0 STABLE7
>>
>> - 2.7STABLE3
>>
>> - 2.6STABLE21
>>
>> - 2.6STABLE3
>>
>> My setup (sometime I need to add acl all or logfile_daemon beetween
>> versions, that's all) :
>>
>> #### CHROOT
>> chroot /usr/local/squid
>> mime_table /etc/mime.conf
>> icon_directory /share/icons
>> error_directory /share/errors/English
>> unlinkd_program /libexec/unlinkd
>> cache_dir ufs /var/cache 100 16 256
>> cache_store_log /var/logs/store.log
>> access_log /var/logs/access.log squid
>> pid_filename /var/logs/squid.pid
>> logfile_daemon /libexec/logfile-daemon
>> ####
>>
>> # Define the required extension methods
>> extension_methods RPC_IN_DATA RPC_OUT_DATA
>>
>> # Publish the RPCoHTTP service via SSL
>> https_port 192.168.1.122:8443
>> cert=/etc/apache2/ssl/webmail.corporate.com.p
>> em defaultsite=webmail.corporate.com
>> cache_peer 172.16.18.13 parent 443 0 no-query originserver login=PASS
>> ssl sslfl
>> ags=DONT_VERIFY_PEER name=exchangeServer
>>
>> acl all src 0.0.0.0/0.0.0.0
>> acl EXCH dstdomain .corporate.com
>> cache_peer_access exchangeServer allow EXCH
>> cache_peer_access exchangeServer deny all
>> never_direct allow EXCH
>> # Lock down access to just the Exchange Server!
>> http_access allow EXCH
>> http_access deny all
>> miss_access allow EXCH
>> miss_access deny all
>>
>> #no local caching
>> #maximum_object_size 0 KB
>> #minimum_object_size 0 KB
>> #no_cache deny all
>>
>> #access_log /usr/local/squid/var/logs/access.log squid
>>
>>
>> Thanks a lot for any tips or informations .
>>
>>
>> !DSPAM:487b2e138671238159409!
>>
>

-- 
Please use Squid 2.7.STABLE3 or 3.0.STABLE7