dns Health Checkups

[Roger Fajman]

>         Our network management systems ping every 15 minutes.  That's
> not often enough and all it tells is that the Ethernet adaptor is
> answering echo request packets.  I have seen a few times in which
> that's exactly all it was doing.

There are several packages that test at the application layer, for DNS
and other protocols.  We use one called IP.Check from Tally Systems
(formerly Baranof), (603) 643-1300.