Interesting paper by Steve Bellovin - Worm propagation in a v6 internet

Todd Vierling tv at
Wed Feb 15 01:46:22 UTC 2006

On Wed, 15 Feb 2006, Mark Andrews wrote:

>     One of method missing is doing top down random walks of

That's only easy if delegation were on a per-nybble basis, which is commonly
not the case.  Because there are not typically NS's at every nybble level,
you have to do more than one hex digit's worth of randomness in the scan in
order to find a next-level delegation, increasing the cost of scanning that
namespace quite a bit.

(Having delegations at every nybble level would be ... alarming at best,
given the amount of PTR redirection that implies.  :)

-- Todd Vierling <tv at> <tv at> <todd at>

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