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It's official: .corp, .home, .mail will never be top-level domains on the 'net

J. Cook Silver badge

@Lee D:

The formal name for the 'hack' is called "Split DNS", and if you've had to deal with Exchange, you will be very, very familiar with it.

example: internally resolves to the load balanced IP address of the exchange client access servers, whereas on the outside, it resolves to an external IP address which points at the same load balancer through a firewall, which is also doing NAT at the same time. This way, you only need to configure a single name, and for the execs and sales people (and others with laptops that tend to unchain themselves from the desk) as long as Exchange and outlook are configured for RPC over HTTPS, it will just work.

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