Indexing Sites The Require TLS

Determining TLS requirements

If a web site cannot be connected to from the indexer, and provides errors such as:

System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: 
A connection attempt failed because the connected party did not properly respond after a period of time, or 
established connection failed because connected host has failed to respond

that may mean that the server will not process requests from clients that don't support the correct TLS version. To easily see which TLS versions are supported, try an online checker.

How to fix connection problems related to TLS

To index web-sites that require the client to support TLS 1.1 or TLS 1.2 for HTTPS connections, one of the following is required;