Unapproved update?

[Kim Halavakoski]

Hi all!

I'm running bind 8.2.2 nad recently the following lines has been appearing in my 
logs

Jan  7 09:05:42 duvel named[516]: unapproved update from [193.64.65.187].1037 
for 65.64.193.in-addr.arpa
Jan  7 10:19:29 duvel named[516]: unapproved update from [193.64.64.78].1944 for 
64.64.193.i
n-addr.arpa

I haven't approved dynamic updates(no allow-update in my named.conf)

So is this just a warning, that someone tried to do a dynamic update, but didn't 
succeed? I believe that those IP:s might be running NT or even Windows 2000 for 
testing...so is this Windows trying to do dynamic DNS updates or what?

Thanks,

Kim