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You experience slow Web browsing performance on internal client computers that use Internet Security and Acceleration Server or Windows Essential Business Server 2008 to manage Web requests
Article ID: 839510 - View products that this article applies to.
You may experience slow Web browsing performance on internal client computers when the following network conditions exist:
This problem occurs because the internal DNS server cannot resolve external DNS names for the Web request that the ISA server the Windows Essential Business Server server is requesting.
When the ISA server or the Windows Essential Business Server server receives a Web request from a client computer, the ISA server or the Windows Essential Business Server server tries to resolve the name of the requested Web site to an IP address. However, because the internal DNS server cannot resolve external DNS names, the request may take longer to process.
Note This problem may occur even if you have configured a routing rule in ISA Server or in Windows Essential Business Server.
To automatically run a Microsoft Visual Basic script that will allow the internal DNS server to resolve external DNS names, click the button in the Fix it for me section. To resolve the problem yourself by running the script included in this article, go to the Let me fix it myself section.
Fix it for me
Fix this problem
Microsoft Fix it 50479
Let me fix it myselfTo resolve this problem yourself, use the Microsoft Visual Basic Scripting Edition (VBScript) code in this section to disable name resolution for the ISA Server routing rules or the Windows Essential Business Server routing rules. To run this code, follow these steps.
Microsoft provides programming examples for illustration only, without warranty either expressed or implied. This includes, but is not limited to, the implied warranties of merchantability or fitness for a particular purpose. This article assumes that you are familiar with the programming language that is being demonstrated and with the tools that are used to create and to debug procedures. Microsoft support engineers can help explain the functionality of a particular procedure, but they will not modify these examples to provide added functionality or construct procedures to meet your specific requirements.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about Microsoft Internet Security and Acceleration Server, visit the following Microsoft Web site:
http://www.microsoft.com/isaserverFor additional information about related topics, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/292018/ )Slow response from downstream ISA Server using Web proxy chaining
Article ID: 839510 - Last Review: September 11, 2011 - Revision: 8.0