update denied

[Edmiston, Jerry]

We are seeing numerous errors in our syslog:
"host" /usr/sbin/named[xxxx]: client 1.2.3.4 #1234: update denied

could anyone give me  a explanation of this message...the clients in
question are not in our DNS d/b and in some cases the network (ie 1.2.3) is
not even defined in named.conf...tks for any help...Jerry

Jerry L. Edmiston
Unix System Admin.
Paymentech, Inc.
jedmisto at paymentech.com
office - 813-351-2213
cell - 813-376-3403