505 (HTTP version not supported) sent to client when ASP.NET application attempts to access WCF service
- by Aaron J Spetner
We have created a DLL to facilitate access of a 3rd-party WCF Service. This DLL works fine in a Windows Application on our test machines, but when we try to use it in an ASP.NET application on our web server, our web server returns a 505 HTTP version not supported error to the client.
To clarify, the setup is Client-Server-WCF Service. Using Fiddler, I can tell that our server is not making requests to the WCF Service. The calls are wrapped in a try/catch block, but no Exception occurs. Instead, as soon as the call to the service is attempted, our server returns a 505 error to the client and terminates execution.
We are using clientCertificate authentication over HTTPS with serviceCertificate certificateValidationMode set to "None".
Thanks
