Re: NTLM performance

[Robert I. <cor...@gm...>]

Hi Kiran Kumar,

On Wed, Jun 23, 2010 at 4:04 AM, kiran kumar <cnv...@gm...> wrote:

> I started using curl-loader to test the performance of NTLM
> Authencitation/HTTP-401 sequence of our HTTP-Server (based on apache).
> The server authenticates every tcp session. I ran the program with
> '-r' option so as not to reuse the tcp connection for subsequent
> connections.
>
> But after initial authentication, curl-loader  is re-using the
> authenticated sessions for subsequent requests. I could not generate
> traffic at required rate. Please find below the configuration file I'm
> using. Packet Exchange is as follows.
>
> 1.Curl-loader sends Http Get request with NTLMSSP_NEGOTIATE payload.
> 2.Server responds with NTLMSSP_CHALLENGE.
> 3.Curl-loader responds with NTLMSSP_AUTH response.
> 4.Post authentication server sends a HTTP-302 message, pointing to a
> different URL for 'NTLM-SUCCESS' case.
> 5.Curl-loader initiates new TCP session (S2) to fetch the new
> effective URL. It did not terminate previous tcp session (S1)
> immediately.
> 6.Curl-Loader sends subsequent GET requests on S1 without sending
> NTLM_NEGOTIATE payload. Even when server sends '401-Authentication'
> required message, it does not terminate the session.
> Can someone suggest if there is some thing wrong in my configuration
> or If I'm missing anything.
>


curl-loader is using libcurl for HTTP.

There is a libcurl limitation for NTLM. You can learn more about the
limitations
at curl-project.

Your options are:
1. using another tool for NTLM;
2. fixing the issues in libcurl;



>
>
> Best Regards,
> Kiran
>

Best wishes,
Robert

>
>
> ########### GENERAL SECTION ################################
> BATCH_NAME= bulk
> CLIENTS_NUM_MAX=100 # Same as CLIENTS_NUM
> CLIENTS_NUM_START=10
> CLIENTS_RAMPUP_INC=10
> INTERFACE   =eth0
> NETMASK=16
> IP_ADDR_MIN= 10.130.17.29
> IP_ADDR_MAX= 10.130.17.30
> IP_SHARED_NUM=2
> CYCLES_NUM= -1
> URLS_NUM= 1
>
> ########### URL SECTION ####################################
>
> URL=http://10.130.18.131:8080/ntlm/authenticate.php?
> ip=10.130.17.3&policy=1&url=10.130.16.131/ntlm/ntlmSuccess.php
>
> REQUEST_TYPE=GET
> TIMER_URL_COMPLETION = 0
> TIMER_AFTER_URL_SLEEP = 0
> WEB_AUTH_METHOD = NTLM
> WEB_AUTH_CREDENTIALS = "DomName\user:passwd"
>
>
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-- 
Truly,
Robert Iakobashvili, Ph.D.
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