When ASP.NET application is used it will use the computer account's store. Remember that our ASP.NET web application is making an HTTP web request to URL so our ASP.NET web application is acting as a client here.Īlthough a browser can be used to test the communication, this may not be the safest way to test each and every scenario because this test will use current user's certificate store.

Now we have faced another problem but the browser test did not show any problem so the certificate seems valid in our browser test, and, we are still seeing the very same error message telling us that the existing connection is forcibly closed by the remote host. We made some basic tests, such as a 'browser test' and found that the certificate was not valid. In our first scenario, we troubleshooted a 'The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel' error message. This is the second part of our series of articles about troubleshooting TLS / SSL communications problems when you make Http Web Request or WCF queries from your ASP.NET applications to SSL endpoints.

How to test tls 1.2 api call .net