domain
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An argument is occasionally made that there is no need for the domain
name servers for a domain to be accessible if the hosts in the domain ...
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An argument is occasionally made that there is no need for the domain
name servers for a domain to be accessible if the hosts in the domain
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... domain
name servers for a domain to be accessible if the hosts in the domain
are unreachable. This argument is fallacious.
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The DNS specification and domain name registration rules require at
least two servers for every zone. That is, usually, the primary and
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Reverse zones, that is, sub-domains of .IN-ADDR.ARPA, tend to be less
crucial, and less servers, less distributed, will often suffice.
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... Administrators should be aware, however, that compromise of a server
for a domain can, in some situations, compromise the security of
hosts ...
... security of
hosts in the domain. Care should be taken in choosing secondary
servers so that this threat is minimised.
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... Mockapetris, P., "Domain Names - Concepts and Facilities", STD 13, RFC 1034std13, November 1987. ...
... Mockapetris, P., "Domain Names - Implementation and Specification", STD 13, RFC 1035std13, November 1987 ...