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Re: HTTP NTLM user authentication

From: Daniel Stenberg <>
Date: Sun, 15 Sep 2013 19:31:47 +0200 (CEST)

On Sat, 14 Sep 2013, Václav Zeman wrote:

> We are trying to use libcurl to do POST requests with SOAP payload. We are
> using libcurl 7.18.0 and we have tested the same code against IIS server
> with Basic authentication enabled. Now we have turned on NTLM as well and we
> are seeing that our client is not able to authenticate. I am attaching
> (anonymized) log file of one session that shows how it cycles the requests
> and dies after 16 attempts (limit set up by our code).
> I would like to know if this is a know bug in older libcurl or if this can
> be caused by our code and the way we set up libcurl?

I don't know. Try the latest libcurl version and see if the problem is still
there. If it is, show us some code on how to repeat the problem and we can
tell if the code looks correct or not.


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Received on 2013-09-15