lots of incoming NXDomain pakets

[Stefan Fournier]

Hi all,

i've got a local DNS Server for our domain.
If i do a tcpdump, i see lots of pakets like:

18:16:27.696289 b.root-servers.net.domain >
tiger.assyst-intl.com.domain: 15099 NXDomain*- 0/1/0 (95) (DF)
18:16:27.714114 b.root-servers.net.domain >
tiger.assyst-intl.com.domain: 15100 NXDomain*- 0/1/0 (103)(DF)

I cannot find out whats the reason of this. As the pakets come every
couple of seconds, our dialup internet
line never gets down, which is really bad, as you can imagine.

Has anyone seen this before and can give me a hint?

Any help is grealy appreciated.

Regards,
Stefan