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

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.

ICF in Windows XP and Windows XP Service Pack 1 (SP1), and ICF and Basic Firewall in Windows Server 2003, filter IPv4 traffic only.

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:

To work around this behavior, obtain firewall software that can filter and block IPv6 traffic.

For additional information, click the following article number to view the article in the Microsoft Knowledge Base: For additional information on IPv6, see the following Microsoft Web site: For security information for IPv6, see the following Microsoft Web site: