primary dns zones on DNS servers at a few of our customers ISP's. So
basically take a list of a ~6 open, recursive, DNS servers. Do a lookup
against them and verify the answer against the known good answer. And do
this once every (TTL). With the current security issues I'm sure
someone has already written better code that I'm going to come up with in
the next hour. Anybody want to share?

David A. Evans
Enterprise IP/DNS Management
Network Infrastructure Tools and Services

Eschew Obfuscation