Configuring Windows Update Service For Xp Sp2 - Extreme Networks AG200 User Manual
Version 5.0
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DHCP Quarantine Method
NOTE
Restrict access to and from the quarantined network at the switch level as well.
Configuring Windows Update Service for XP SP2
If you plan to use Endpoint Routing Enforcement, note that most endpoints running Windows XP
Service Pack 2 cannot run Windows Update successfully from within quarantine, because of a
WinHTTP bug that as of this writing has not been fixed (see
http://support.microsoft.com/kb/919477/
for
more details.) Endpoints not in quarantine are not affected.
The problem occurs because the Windows Update (WU) client software uses WinHTTP to connect to
Microsoft's download sites; Internet Explorer connects to windowsupdate.microsoft.com; however, an
error is displayed once the user clicks on the Express or Custom download buttons that invoke the WU
client software.
Short of a Microsoft fix, the only way to update XP SP2 endpoints in quarantine is to deploy a local
update server (such as Microsoft's free Windows Server Update Services, WSUS -- see
http://www.microsoft.com/technet/windowsserver/wsus/default.mspx) and make sure that this server is
listed in Accessible Services and Devices ("Accessible Services" on page 115).
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Sentriant AG Users' Guide, Version 5.0
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