michael.monnerie at is.it-management.at
Mon Aug 10 19:10:15 UTC 2009
We are having 2 sites at different locations now with a DNS resolver on
each site. Internet speed between those two different ISPs is very fast,
and the hosts to resolve will be about the same because of similar
My idea is to use
on site Y and
on site X, but, as I couldn't find it in the documents, I believe this
could lead to a resolver loop between X and Y and therefore even slower
resolution. Or is BIND clever enough to only ask the other server once?
My tests seem to indicate it's working well, but maybe someone knows of
There are 2 reasons for this:
1) performance. Having the caches hot on both sides and with a high
chance one caches knows entries the other can use, it should be quick.
2) reliability. Asking only internal servers which I can control is more
secure than using any ISPs DNS. They start to do the DNS mangling here
in Austria also (instead NXDOMAIN they deliver their web sites A record
to point to their search engine).
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