The initial use of IPv6 in North America will likely involve Teredo
enabled NATs and Teredo servers. It does not seem NATs will go away
anytime soon, especially those adding Teredo compliance to ensure
multi-player games function without router configuration.
Just a point of clarity: Teredo works fine through most home
routers/gateways today. The manufacturers of these routers don't need to
do anything in particular to "enable Teredo". Only a minority of these
routers do need to be fixed, i.e. those implementing variations of
"symmetric NAT".
-- Christian Huitema
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