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IE not reply type 3 NTLM message

843810Jan 22 2010 — edited Feb 6 2010
HI All,

I am implementing a SSO using NTLM. The steps are:

Step1: Cliente ask for resource
Step2: Server ask for NTLM negotiation
Step 3: Client sends to the server NTLM type 1 message
Step4: Server sends back to the client NTLM type 2 message
Step5: Client sends type 3 message.

The problem I have is in Step 5, when the browser receives the type 2 message, it just stops displaying "IE cannot display the webpage" and sends nothing to the server.

I have checked that I am sending a correctly the type 2 message, using a sniffer I can see the NTLM type 2 message (challenge) and it is well formed (I have test also different flags configuration). I have test also with Firefox and the same behaviour. Server and client are in the same Domain.

I will appreciate any clue in what I could try or investigate as I have tested all possible things and I am blocked.

Thanks in advance.
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Locked on Mar 6 2010
Added on Jan 22 2010
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