why they keep DNS server and Mail client Server is placed outside the intranet of a company?

| DNS | By: registrar

Is there any particular reason to place the DNS server and Mail client Server outside of a company what would be a validate of the above problem?

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Comment from None
Time April 7, 2010 at 4:14 pm

The simple answer is to keep publicly facing servers out of your internal LAN. If the server or device is internet facing, that means it has a greater attack surface. If someone hacks into the server, they are then on your internal network. If you have the server on the outside in a DMZ, then they can be isolated from your internal hosts if they are compromised.

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