Teredo source addresses from 6to4 relay

David Malone dwmalone at maths.tcd.ie
Wed May 16 10:13:16 CEST 2007


On Fri, May 11, 2007 at 11:44:47AM +0200, Remi Denis-Courmont wrote:
> What you would need there is source routing. Better yet understand why
> RFC3484 is not applied properly...

Well, FreeBSD 4 behaved (roughly) as if it had RFC 3484 but with
an empty policy table. Later versions of FreeBSD have a configurable
table and by default you should get the table suggested in RFC 3484.
OTOH, until quite recently vinilla Linux kernels just picked the
first IPv6 address of the right scope on the outgoing interface. I
think the situation is a bit better now.

The default policy has no mention of Teredo. I wonder what the
pros and cons of adding an entry for 2000:0000::/32 to treat Teredo
in a similar way to 6to4 would be?

	David.


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