On Thu, May 16, 2019 at 1:20 PM Sander Steffann <[email protected]> wrote:
> Hi David, > > > While I happen to agree with you 2002::/16 SHOULD NOT be filtered, and > RFC 7526 is quite clear that 2002::/16 is still valid. However, it is > perfectly permissible to filter it, if that is the policy a network > operator wishes to enforce. > > With the 6to4 anycast relays deprecated the only 6to4 traffic should be > src 2002::/16 and dst 2002::/16. Sites that are not using 6to4 themselves > can filter 2002::/16. Everybody else will only see IPv4+proto41 traffic, > which is not impacted by that filter. > NO! RFC3056 Includes a gateway functionality it is just not Anycast. It is possible to locally gateway traffic to native IPv6 and then you would get traffic sourced from 2002::/16 and then you need to send traffic to a return gateway. Now, most traffic you are seeing is probably coming from the public anycast gateways that are still running, but it doesn't have to be. As I said elsewhere in the thread, it complicated and filtering is easy. Read RFC7526 very carefully, if you care, if you don't just filter it. Thanks -- =============================================== David Farmer Email:[email protected] Networking & Telecommunication Services Office of Information Technology University of Minnesota 2218 University Ave SE Phone: 612-626-0815 Minneapolis, MN 55414-3029 Cell: 612-812-9952 ===============================================
