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I have a .NET 4.5 web application that runs fine on a Windows Server 2012 R2 machine, however it won't function when deployed on a Windows Server 2016 machine.

The application interacts with a rather old Ejbca installation utilizing its web service interface.
The application works perfectly fine when deployed on a Windows Server 2012 R2 machine in IIS 8.5.9600.
When deployed on a newer machine - Windows Server 2016 in IIS 10.0, any calls to that web service fail with the following exception:

<InnerException>
   <HelpLink i:nil="true"/>
   <InnerException i:nil="true"/>
   <Message>The request was aborted: Could not create SSL/TLS secure channel</Message>
   <StackTrace>at System.Net.HttpWebRequest.GetResponse()
    at System.ServiceModel.Channels.HttpChannelFactory`1.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
   </StackTrace>
   <Type>System.Net.WebException</Type>
</InnerException>

What could be the reason for this behavior?

Andrew Jaginoff
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  • You can refer to: https://stackoverflow.com/questions/2859790/the-request-was-aborted-could-not-create-ssl-tls-secure-channel – Theobald Du Jun 25 '21 at 01:37
  • Use a tool like Wireshark to analyze the TLS handshake packets. That can tell you more on what's wrong and how to fix that. – Lex Li Jun 25 '21 at 06:32

0 Answers0