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.
To resolve this problem, obtain and install the Advanced
Networking Pack for Windows XP.
additional information about the Advanced Networking Pack for Windows XP, click
the following article number to view the article in the Microsoft Knowledge
Overview of the Advanced Networking Pack for Windows XP
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:
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