Specify this as true if the web client should establish a tunnel through the proxy to the target HTTP server. If true, the request uses the HTTP CONNECT command to establish a tunnel. The address of the proxy server is taken from the HttpProxyServer and HttpProxyPort properties. If the endpoint URL has the https: protocol, then once the tunnel is established, InterSystems IRIS negotiates the SSL connection. In this case, the HttpProxyHTTPS property is ignored because the tunnel establishes a direct connection with the target system.