New ZeroConf Spec

Dan Kegel dank at
Thu Jul 20 22:59:36 BST 2006

On 7/20/06, Florian Zeitz <Florian.Zeitz at> wrote:
> > I don't use Avahi, so perhaps I've been misled. But according to what I
> > understand from descriptions on this mailing list, it will keep an open
> > listen on a known UDP port, accepting any packet fed to it, all of which
> > are capable of altering its knowledge of the Domain Name System. If all
> > of this is correct, then I don't know why we're arguing about whether it
> > has secuirty issues or not: it is _trivial_ to demonstrate how DNS
> > poisioning can lead to serious problems for the unwary (and even the
> > wary) user.
> >
> Actually that is not the way I understood zeroconf, or at least not as
> the main point behind it. AFAIK it's main purpose is to advertise
> services to other users on the network.

And to *receive* those advertisements, in a highly indiscriminate manner.
ANYBODY can advertise a service, even a rogue node.
And there is *no* security built into Avahi that can protect users from
accidentally using a rogue service offered by a compromosed node on the local
- Dan

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