Hello all, For anyone that is interested, there is a new report available about Teredo security: http://www.symantec.com/avcenter/reference/Teredo_Security.pdf >From the abstract: Teredo is a platform-independent protocol developed by Microsoft, which is enabled by default in Windows Vista. Teredo provides a way for nodes located behind an IPv4 NAT to connect to IPv6 nodes on the Internet. However, by tunneling IPv6 traffic over IPv4 UDP through the NAT and directly to the end node, Teredo raises some security concerns. Primary concerns include bypassing security controls, reducing defense in depth, and allowing unsolicited traffic. Additional security concerns associated with the use of Teredo include the capability of remote nodes to open the NAT for themselves, benefits to worms, ways to deny Teredo service, and the difficulty in finding all Teredo traffic to inspect. You can also read the blog announcing the report: http://tinyurl.com/ulk9o I hope you find this interesting or useful. I spent a couple months of research exploring the topic. Best, Jim -- Jim Hoagland, Ph.D., CISSP Principal Security Researcher Advanced Threats Research Symantec Security Response www.symantec.com
