What are these entries in the log file - " query: . IN NS +"?

[Tony Toews [MVP]]

Folks

Warning - I know just enough about Bind to be dangerous.   Which is why I'm asking.

I just noticed that our small scale Bind server as a lot of the following lines.

26-Jan-2009 14:28:24.004 client 76.9.16.171#23101: query: . IN NS +
26-Jan-2009 14:28:58.254 client 63.217.28.226#28035: query: . IN NS +
26-Jan-2009 14:29:00.691 client 63.217.28.226#35549: query: . IN NS +
26-Jan-2009 14:29:26.332 client 76.9.16.171#19817: query: . IN NS +

As far as I can tell from the same 5 or 20 IP addresses.  I haven't seen these lines
before.

1) What am I doing wrong?  If anything.

2) What are they?

Thanks, Tony
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Tony Toews, Microsoft Access MVP
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