Could not establish secure channel for SSL/TLS with authority '*'

Question

I must consume a PHP webservice which has a SSL certificate. My .net 3.5 Class library references the webservice with \'Add Service references\' in Visualstudio 2010 (WCF ri

Answer 1

Problem

I was running into the same error message while calling a third party API from my ASP.NET Core MVC project.

Could not establish secure channel for SSL/TLS with authority '{base_url_of_WS}'.

Solution

It turned out that the third party API's server required TLS 1.2. To resolve this issue, I added the following line of code to my controller's constructor:

System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls12;