Bug 29073 - WebRequest with NTLM based Auth always times out on Mono
Summary: WebRequest with NTLM based Auth always times out on Mono
Alias: None
Product: Class Libraries
Classification: Mono
Component: General ()
Version: 3.12.0
Hardware: PC Mac OS
: --- normal
Target Milestone: Untriaged
Assignee: Bugzilla
Depends on:
Reported: 2015-04-14 08:45 UTC by John Miller [MSFT]
Modified: 2015-05-06 13:30 UTC (History)
8 users (show)

Is this bug a regression?: ---
Last known good build:

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Description John Miller [MSFT] 2015-04-14 08:45:56 UTC

   Trying to connect to a server with NTLM based AUTH always fails with Mono.

**Steps to Reproduce:**

   See private comment below. 

**Actual Results:**

   The request either never completes or times out when using Mono. 

**Expected Results:**

   Response should be valid. Using .NET, this works. 

**Build Date & Platform:**

   Mono 3.12

**Additional Information:**

   Run the test on Windows with .NET and the request/response will work as expected.
Comment 2 Dominic N [MSFT] 2015-04-14 12:06:32 UTC
I have been able to replicate the issue on my end. Marking as confirmed.
Comment 3 Martin Baulig 2015-04-21 07:15:08 UTC
Comment 5 Miguel de Icaza [MSFT] 2015-04-21 15:25:19 UTC
We have some information to share.

The issue is not NTLM, as we do not even get a chance to speak NTLM to the server.   Instead the server immediately closes the connection after Mono tries to contact the remote server.

We have a bug in Mono: we hang instead of immediately reporting the error, we will address that.

In the meantime, it seems like the server would like us to support some cipher suite that we do not support, but we can not diagnose what that is.   That would need to have to be diagnosed on the server end.