Internet Connection Firewall and Basic Firewall do not block Internet Protocol Version 6 traffic

Support for Windows XP has ended

Microsoft ended support for Windows XP on April 8, 2014. This change has affected your software updates and security options. Learn what this means for you and how to stay protected.

Support for Windows Server 2003 ended on July 14, 2015

Microsoft ended support for Windows Server 2003 on July 14, 2015. This change has affected your software updates and security options. Learn what this means for you and how to stay protected.

This article was previously published under Q306203
This article has been archived. It is offered "as is" and will no longer be updated.
SYMPTOMS
With Microsoft Internet Protocol version 6 (IPv6) installed and Internet Connection Firewall (ICF) or Basic Firewall enabled, the firewall filters Internet Protocol version 4 (IPv4) traffic, but the basic firewall and the ICF do not block or filter IPv6 traffic.

Note ICF is available on Microsoft Windows XP and Microsoft Windows Server 2003, Standard Edition and Windows Server 2003, Enterprise Edition. Basic Firewall is a component of Routing and Remote Access that you can enable for any public interface on a computer that is running Routing and Remote Access and is a member of the Windows Server 2003 family.
CAUSE
ICF in Windows XP and Windows XP Service Pack 1 (SP1), and ICF and Basic Firewall in Windows Server 2003, filter IPv4 traffic only.
RESOLUTION

Windows XP

To resolve this problem, obtain and install the Advanced Networking Pack for Windows XP. For additional information about the Advanced Networking Pack for Windows XP, click the following article number to view the article in the Microsoft Knowledge Base:
817778 Overview of the Advanced Networking Pack for Windows XP
WORKAROUND
To work around this behavior, obtain firewall software that can filter and block IPv6 traffic.
MORE INFORMATION
For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
320855 Description of the Windows XP Internet Connection Firewall
For additional information on IPv6, see the following Microsoft Web site: For security information for IPv6, see the following Microsoft Web site:
ipv6 icf
Properties

Article ID: 306203 - Last Review: 12/06/2015 04:55:06 - Revision: 6.7

Microsoft Windows Server 2003, Datacenter Edition (32-bit x86), Microsoft Windows Server 2003, Enterprise Edition (32-bit x86), Microsoft Windows Server 2003, Standard Edition (32-bit x86), Microsoft Windows Server 2003, Web Edition, Microsoft Windows XP Home Edition, Microsoft Windows XP Home Edition SP1, Microsoft Windows XP Media Center Edition, Microsoft Windows XP Professional, Microsoft Windows XP Professional SP1, Microsoft Windows XP Tablet PC Edition

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