TLS / SSL negotiation errors
Question asked by CCC - September 29, 2014 at 10:56 AM
Unanswered
We are seeing some of these errors in our logs
 
Exception negotiating TLS session: System.Security.Authentication.AuthenticationException: A call to SSPI failed, see inner exception. ---> System.ComponentModel.Win32Exception: The message received was unexpected or badly formatted
 
Any way to tell which cyphers they are trying (and failing) to negotiate?
 
 
 
 
 
 

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Joe Wolf Replied
I agree you should run IISCrypto and use the "Best Practices" setting. You may also want to diagnose some of the problems using https://www.ssllabs.com/ssltest

-Joe
Thanks,
-Joe
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CCC Replied
Looks to have been related to TLSv1.0, I would have thought the sender would have just negotiated a more secure cipher.

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