DNS server generates an enormous amount of traffic

[Jim Reid]

>>>>> "Irvine" == Irvine Short <irvines at iafrica.com> writes:

    Irvine> Hi I've got a machine that is primary DNS for two domains.

    Irvine> It's generating so much traffic as to cause 2 - 3 second
    Irvine> pings on a 64k (like a USA 56k) leased line.

    Irvine> How can I start debugging this?

Try looking at the traffic with tcpdump or a LAN sniffer. That should
tell you what's filling up your line. You could also enable  query
logging on the name server to see who's sending it queries. Maybe
you've got some idiot resolvers sitting in a tight loop asking for
names over and over.

BTW, how do you know that the name server is generating the traffic?
Perhaps it's getting bombarded with queries from the other end of the
line?

Are you running up to date name server code? ie something that does
negative caching....