FIX: Large files become corrupted during file transfer through the Socks V4 client

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Article ID: 2620088 - View products that this article applies to.
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SYMPTOMS

Consider the following scenario:
  • You have a server that is running Microsoft Internet Security and Acceleration (ISA) 2006.
  • Internal clients use ISA 2006 as their outgoing firewall.
  • Internal clients use Socks V4 to connect to an Internet resource through the ISA 2006 server.
  • A Socks V4 internal client has to download a large file from the Internet resource, for example, by using FTP protocol.
In this scenario, the large file that is downloaded by the client is corrupted.

CAUSE

There is a problem in the Socks V4 application filter that is included together with ISA 2006. This issue does not occur when you use a third-party Socks V5 application filter.

RESOLUTION

To resolve this problem, install the ISA Server 2006 hotfix rollup package that is described in the following Microsoft Knowledge Base article:
2616326 Description of the ISA Server 2006 hotfix package: September 2011

Properties

Article ID: 2620088 - Last Review: October 5, 2011 - Revision: 1.0
APPLIES TO
  • Microsoft Internet Security and Acceleration Server 2006 Service Pack 1, when used with:
    • Microsoft Internet Security and Acceleration Server 2006 Enterprise Edition
    • Microsoft Internet Security and Acceleration Server 2006 Standard Edition
Keywords: 
kbqfe kbfix kbexpertiseadvanced kbhotfixserver kbhotfixrollup kbcorrupt KB2620088

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