Symptom:
Content Redirection from server to client fails when client device is using a proxy to access the Internet.
Cause:
When the client device uses a proxy server to connect to the Internet, the HttpPing (HTTP PING) API fails and the browser on the server is opened instead.
The ICA clients do not properly use HTTP keep-alive headers if Microsoft Internet Explorer is configured to use HTTP 1.0. Because integrated (NTLM) proxy authentication requires a persistent connection to authenticate the client, the connection may not succeed when NTLM authentication is performed with the Web proxy.
Resolution:
1. | Start Internet Explorer. |
2. | On the Tools menu, click Internet Options. |
3. | Click the Advanced tab. |
4. | Select the Use HTTP 1.1 through Proxy Connections check box, and then click OK. |
5. | Quit and then restart Internet Explorer, and then try to connect to the Windows Update Web site again. |
Because HTTP 1.1 uses persistent connections by default, the entire NTLM handshake takes place on the same TCP connection and the proxy authentication succeeds.
