C# , Net Framework 4.7.2, I have built a connection to Azure IoT Hub using the provided device SDK's. My application functions as expected when running on a Win 10 OS. When I run my application on Win 7 I receive this exception:
Microsoft.Azure.Devices.Provisioning.Client.ProvisioningTransportException: HTTP transport exception ---> System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a send. ---> System.IO.IOException: Authentication failed because the remote party has closed the transport stream.
With some research I fount that it may be due to the security protocol type, but I did not set the protocol type explicitly like the reference below state:
Authentication failed because remote party has closed the transport stream
What I am using is a SecurityProviderSymmetricKey to build a connection to the DPS.
I also verified that my Win 7 machine had TLS 1.2 enabled, since based on what I have researched it is not enable by default, & I still receive the exception.
What I also found it that the device SDK does not allow you to specify the protocol, & it uses the default of the machine.
https://github.com/Azure/azure-iot-sdk-csharp https://github.com/Azure/azure-iot-sdk-csharp/blob/master/configure_tls_protocol_version_and_ciphers.md
Any ideas on to why it would be building the connection properly on Win 10 and not Win 7? Any ideas on changes that need to be made, or how I can troubleshoot this issue further?
