Securing IPv6 Networks
Windows Server 2003 currently supports the use of IPv6 only when IPv4 is also installed. Because TCP/IP internetworks are susceptible to a variety of attacks, ranging from passive attacks, such as eavesdropping, to active attacks, such as denial-of-service attacks, be sure to follow best practices for security when using IPv6 on your network. A few general and IPSec-related IPv6 security suggestions follow.
General Recommendations for Securing IPv6 Networks
Be aware of the following known security risks for IPv6, and consider reconfiguring your system to meet the recommendation that is shown for each:
The installation of an unauthorized router can cause reconfiguration of clients and rerouting of IPv6 traffic.
To communicate ...