I tested ping, trace route and browsing over Teredo... and it work!
C:\Users\huitema>tracert /6 www.ietf.org
Tracing route to www.ietf.org [2610:a0:c779:b::d1ad:35b4]
over a maximum of 30 hops:
1 153 ms 82 ms 83 ms iad0-stf.hotnic.net
[2001:4810:0:100::3]
2 84 ms 83 ms 84 ms iad0-b1-ge0.hotnic.net
[2001:4810:0:100::2]
3 85 ms 85 ms 87 ms equinix6-was.ip.tiscali.net
[2001:504:0:2::3257:
1]
4 97 ms 85 ms 84 ms equi6ix-ash.ipv6.us.occaid.net
[2001:504:0:2:0:3
:71:1]
5 92 ms 92 ms 90 ms unassigned.in6.twdx.net
[2001:4830:e6:d::2]
6 * * * Request timed out.
7 91 ms 89 ms 88 ms www.ietf.ORG
[2610:a0:c779:b::d1ad:35b4]
Trace complete.
-- Christian Huitema
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