New ZeroConf Spec

[Dan Kegel]

On 7/4/06, Scott James Remnant <scott at ubuntu.com> wrote:
> > There should be no exception: there should be no open ports by default.
> >
> This isn't actually entirely true; we currently have two open ports by
> default:
>
> If you're on a network with DHCP, the DHCP client listens on UDP port 68
> to receive responses from the DHCP server.
>
> And every time you make a DNS query, a UDP port is opened to receive the
> response from the DNS server.

Both of these are examples of getting replies to queries sent out by the
system, so they don't count, really.
- Dan