The IPv6 Hackers list was created in August 2011 to provide a forum for IPv6 security researchers and IPv6 networking professionals to discuss low-level
IPv6 networking and security issues that could eventually lead to advances and improvements in the area of IPv6 security and IPv6 networking

The community interacts on a mailing-list, but occasionally also has face-to-face meetings (usually next to other events and/or conferences).