…unning a 6to4 relay or offering a 6to4 transit service. Running such a service [RFC3964] entails filtering rules specific to 6to4 [RFC3964]. IPv4 addresses disallowed in 6to4 prefixes are listed in section 5.3.1 of [RFC3964]. 2.8. Teredo 2001::/32 are the Teredo addresses [RFC438…

…nning a 6to4 relay or offering a 6to4 transit service. Running such a service [ RFC3964 ] entails filtering rules specific to 6to4 [ RFC3964 ]. IPv4 addresses disallowed in 6to4 prefixes are listed in section 5.3.1 of [RFC3964] . 2.8 . Teredo 2001::/32 are the Teredo addresses [ …

…ssues with tunnels are listed in [ RFC6169 ] and more specifically to 6to4 in [ RFC3964 ] and [ RFC6324 ]. 9 . References 9.1 . Normative References [ RFC2026 ] Bradner, S., "The Internet Standards Process -- Revision 3", BCP 9 , RFC 2026 , DOI 10.17487/RFC2026, October 1996, < h…