Using TLS 1.1, 1.2 in .Net 4.0 Application

Posted on Thursday, August 3, 2017 by Nicki

One of our partners stopped support for SSL3.0 and TLS1.0 on a service that we connect to with a .Net 4.0 application.

Using WireShark we determined that the application was attempting connections using SSL3.0 and TLS1.0 only. Digging into this we found a link mentioning that a registry value needs to be configured for .Net4.0 to be able to use TLS1.0 and above.

Once we configured the registry value and restarted the application, it was able to connect to the remote service.