1. RFC 2993 - architectural implications of NAT. http://tools.ietf.org/html/rfc2993
2. RFC 4864 - local network protection for IPv6. http://tools.ietf.org/html/rfc4864
3. RFC 4942 - IPv6 transition/co-existence security considerations. http://tools.ietf.org/html/rfc4942
4. RFC 7059 - a comparison of IPv6-over-IPv4 tunnel mechanisms. http://tools.ietf.org/html/rfc7059
5. RFC 6092 - recommended simple security capabilities in customer premises equipment (CPE) for providing residential IPv6 internet service. http://tools.ietf.org/html/rfc6092