Apache Dynamic Routing

I think this crosses several Apache boundaries (and networking too). I am looking for a little assistance understanding what may be involved.

I host (at home) a small CMS system used by around a dozen people. I cannot always contact them when an outage is required or just happens. I'd like to have a redirected site show a 'down for maintenance' page when I can schedule down time. I'd also like to have the opportunity to point them to a different host so the interruption may not be...

Apache Dynamic Routing

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