Netflix banning HE tunnels

Fri Jun 10 15:21:52 UTC 2016

Randy Bush wrote:

> https://archive.psg.com/120206.nanog-v4-life-extension.pdf
>
> randy, who works for the first isp to deploy ipv6 to customers

To be a salmon, all we need is fish passages around dams of NAT boxes.

As such, static binding on port/IP at NAT boxes is fine, as long as
the binding information is statically known to end systems, and the
end systems can reverse the binding and applications on the end
systems at IP or transport layer, which means applications on the
end systems can behave as unmodified applications on hosts directly
connected to the Internet.

That is,

     A NAT Box        An End System

                    |   Applications   |
    +-----------+   +------------------+
    | NAT at L4 |   | Reverse NAT at L4|
    +-----------+   +------------------+
    | NAT at L3 |   | Reverse NAT at L3|
    +-----------+   +------------------+
    |    L2     |   |        L2        |
    +-----------+   +------------------+
    |    L1     |   |        L1        |
    +-----------+   +------------------+
       |      |       |
       |      +-------+
       v
   To The Internet

is a proper solution for >4G people enjoy the end to end
connectivity with IPv4.

As such, the fish passages can be constructed, if translation
behavior of the NAT boxes are known to end systems so that
the end systems have sufficient knowledge to reverse the
translation.

					Masataka Ohta