Stopping recursive queries from others

[Mark Damrose]

"Ewald Peters" <ewald_peters at yahoo.com> wrote in message
news:abrvvf$1qkt$1 at isrv4.isc.org...
>
> glen herrmannsfeldt wrote:
>
> > >I found out that many others from outside the internet ask my
nameserver
> >
> > >to search for them. This is what i would like to switch off.
> > >I didn't find any info about that in the man pages.
> >
> > Unless you are a well known site, it is unlikely that a lot of people
> > are using your nameserver for recursive queries.  Possible, but
> > unlikely.
> >
> > Why do you believe they are doing it?  named does seem to like to
> > ask a lot of questions.  I have seen many packets sent to my
nameservers,
> > and then figured out that it was related to requests that I had made.
> >
>
> normally that's true but i already found out (with tcpdump) that many
others
> are just dialin-customers from somebody that use my nameserver with
> lotts of traffic, and that these requests don't come from my server.
>
> Ewald
>
>
I've found that my own users take their laptops home.  If they don't release
their DHCP assigned parameters before they disconnect, then the DNS servers
from my network are still in their configuration and will get used.