You experience a delay when you use your Windows XP computer to log on to a domain or to connect to a network resource (832161)

	"ProxyEnable"=1
	"ProxyServer"="http://ProxyServername:PortNumber"
	"ProxyOverride"="*.intranet; domaincontroller1;*.domain.com;10.10.*;<local>"

function FindProxyForURL(url, host)

{

}

function FindProxyForURL(url, host)
{if (shExpMatch(host, "DCNAME*")) {                
     return "DIRECT";                                 
 } 

MORE INFORMATION

The WebClient service enables Windows-based programs to create, access, and modify Internet-based files using Win32 APIs. If this service is stopped, these functions are not available.

Turning off WebClient service stops the WebDAV redirector. You will not be able to use command-line commands such as net use, dir, copy, and rename to a Web server. You cannot use Add Network Place to add a Web DAV location. You cannot use Publishing Wizard to publish to MSN Communities. However, you can still continue to use servers that support the Server Message Block (SMB) protocol.

In Windows XP and later versions, the Windows file redirector has a built-in WebDAV client. Microsoft Office 2000 and Microsoft Office XP and Microsoft Office System 2003 have built-in WebDAV redirectors that work independently from the WebClient service.

Windows XP WebDAV Redirector

Windows XP includes the new WebDAV redirector component. With the WebDAV redirector component, programs that run on Windows XP can connect to the Internet, and can natively read and write data on the Internet. The WebDAV protocol is an extension to HTTP that lets data be written to HTTP targets such as the Microsoft MSN Web Communities. The WebDAV redirector provides file system-level access to these servers like the existing redirector provides access to SMB and Common Internet File System (CIFS) servers.

One way that you can access a WebDAV share is to use the net use command. For example, you can use the following command at the command prompt: NET USE * http://webserver/davscratch

To connect to an MSN Community, use http://www.msnusers.com/yourcommunityname/files/ as the target. The credentials you must use are your Microsoft .NET Passport credentials. Enter these details in the Connect Using Different User Name dialog box if you are using a mapped network drive, or use the /u: switch with the net use command. For example, you can use the following command at the command prompt: NET USE http://www.msnusers.com/yourname/files /u:yourpassportaccount@hotmail.com

Windows XP

The WebClient service is used if you connect a Web Folders without specifying a port. For example, if you use the "http://webserver/davscratch" URL, a network trace shows something that is similar to the following in the HTTP header:

 
  HTTP: User-Agent = Microsoft-WebDAV-MiniRedir/5.1.2600

Microsoft Office

When you use the syntax that includes a port number, you connect with Office WebDAV. For example, if you use the "http://webserver:80/davscratch" URL, a network trace shows something that is similar to the following: Note This may or may not show as "HTTP" traffic in Network Monitor because the proxy port can vary.

Notes

The following describes some of the known interoperability issues with WebDAV:

• By default on Windows Server 2003, the WebDAV client is not enabled for security reasons. You have to enable the WebClient service.
• Using Microsoft Office 2000 to connect to a Windows WebDAV share is only supported if Office 2000 is running on Windows 2000 or earlier operating systems. Using Office 2000 running on Windows XP-based computer to connect to a Windows WebDAV share is not supported.
• When you use Microsoft Office on a Windows XP-based computer, use the Office WebDAV redirector instead of the Windows XP file redirector. Generally, when you use Microsoft Office products, it is best to use files that are represented by their HTTP names instead of their UNC paths. For example, use "http://Device Name/Virtual Root/File Name" instead of "\\Device Name\Virtual Root\File Name."

Disabling the WebClient does not affect Internet browsing. The WebClient is used only for Web Distributed Authoring and Versioning (WebDAV) connections.

When the Universal Naming Conventions (UNC) file name is used, the redirector will use SMB, WebDAV, or a combination of the two, depending on what is available on the server.

When an application tries to open a file that exists on a network, the I/O manager passes the request to a system component that is named the Multiple UNC Provider (MUP). MUP sits logically above all the redirectors. When a network path is passed to MUP, it polls all the registered redirectors to determine whether they understand the path. The redirectors in turn contact the server to establish if the path is valid for the specific protocol. If the server can satisfy the connection, the redirector will return success back the MUP. If not, the redirector returns a failure. All the future file I/O requests for this file are passed to the redirector that accepted the path. If more than one redirector accepts the path, MUP picks the one with the highest priority, as defined in the registry. For more information about problems with multiple redirectors, click the following article number to view the article in the Microsoft Knowledge Base:

URLScan blocks WebDAV requests

To learn more about URLScan, visit the following Microsoft Web site:

Registry setting for timeouts

The WebClient service maintains a list of non-DAV servers (negative cache) that have been contacted in the last 60 seconds. If the server is found in this list, a fail is returned immediately without going on the network. The time a server remains in this list can be modified by changing the value of the ServerNotFoundCacheLifeTimeInSec registry entry.

Note If the \HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WebClient\Parameters\ServerNotFoundCacheLifeTimeInSec registry entry does not exist, create the entry.


RequestTimeoutInSec represents the number of seconds that WebDAV waits for WinInet after issuing a request such as "Get file" or "Put file."