> Actually your web server is most of the time co located at a big
> provider (vhost) and your backup MX servers are also located with
> your provider. So even if your office has no ip connection does
> not mean that nobody will use your DNS.
You normally don't put authorative DNS servers or public MX's on
your office connection. Your office connection should only be doing
recursive resolving for the clients in the office. All authorative
data would be served to the world from the faster network. If your
company decided to serve everything from office, it's still all in
one place like I mentioned before. All you're doing is moving the
single public presence to a co-location facility.
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