[THIN] KB: CTX911389 - Content Redirection from Server to Client Fails When Client Workstation is Using a Proxy to Access the Internet
- From: "Jim Kenzig Kenzig.com" <jkenzig@xxxxxxxxx>
- To: thin@xxxxxxxxxxxxx
- Date: Mon, 22 Aug 2005 08:59:06 -0700 (PDT)
CTX911389 - Content Redirection from Server to Client Fails When Client
Workstation is Using a Proxy to Access the Internet
This document was published at:
http://support.citrix.com/kb/entry.jspa?externalID=CTX911389
Document ID: CTX911389, Created on: Oct 4, 2002, Updated: Jun 27, 2005
Products: Citrix MetaFrame XP 1.0 for Microsoft Windows 2000, Citrix MetaFrame
XP 1.0 for Microsoft Windows 2003, Citrix MetaFrame Presentation Server 3.0 for
Microsoft Windows 2000, Citrix MetaFrame Presentation Server 3.0 for Microsoft
Windows 2003, ICA Win32 Program Neighborhood Agent, ICA Win32 Program
Neighborhood Client, ICA Win32 Web Client
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.
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