On killing IPv6 transition mechanisms

Tim Chown tjc at ecs.soton.ac.uk
Thu Mar 11 15:12:28 CET 2010

On Thu, Mar 11, 2010 at 02:47:15PM +0100, Jeroen Massar wrote:
> Martin Millnert wrote:
> > On Thu, 2010-03-11 at 14:24 +0100, Jeroen Massar wrote:
> >> The thing with 6to4 & Teredo (& Tunnel Brokers & 6rd etc etc)
> > <snip>
> >> I do also hope folks realize that one day or
> >> another they should be turning those services off, especially in the
> >> light of security and the abuse that can be done through them (spoofing
> >> ole).
> > 
> > Agreed.  For the same reason, the RIR:s should make sure that 6rd
> > allocations are transitional only, ie temporary. In other words, once
> > the transition is complete, the space will be returned. This is another
> > topic though and is probably more appropriate for $RIR-ipv6-wg-list.
> That address space comes from the ISP's own /32 (or more), and thus, if
> they plan correctly they can easily stop doing 6rd at one point and then
> re-use that address space for something else.

Agreed, that's one beauty of 6rd - the ISP can contain its transition
within its own address space, at its own pace.

I'm interested in what Nick's many gigabits of 6to4 traffic is - what
are the apps people are running?   For us, at least for website access,
less than 1% of the IPv6 traffic we get is from 6to4 sources.


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