I think people are making this way more complex than necessary:
Two conditions exist:
1 - A DNS entry is essentially dead, nobody will notice if it's deleted. (probably > 95%) 2 - A DNS entry is in use. If it disappears, the affected party will notice and it can be corrected.
In general, it's time to flush old entries.
On Tue, Jan 19, 2016 at 10:14 AM, Steve L kb9mwr@gmail.com wrote:
(Please trim inclusions from previous messages) _______________________________________________ I don't know how practical it would be to to try and monitor the dns server queries to help id which entries are used vs unused. But it might be something to consider sooner than later as you'd want to let this run for quite some time to build some statistics.
Just throwing the idea out there.
As for figuring out what is unused or not, there isn't any good way of determining that.
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