RE: [isp-dns] Split DNS

[Len Conrad <LConrad@...>]

> If by different resources your saying that
> www.domain.com is on the outside but mail.domain.com is on the inside then
> this should not be a problem.
> You can make your NS authoritive for domain.com
spoofing domain authority is bad practice.

> and specify another external
> NS as authoritive for mail.domain.com
An NS spoofing authority for domain.com and then also delegating 
sub.domain.com to the authoritative NS is REALLY bad 
practice.  Delegation of sub.domain.com would have to be done for 
every sub-domain of domain.com. The only way to keep the spoofing NS 
and the auth NS in sync is manually, which means they will be out of 
sync in practice.

The way I recommended is the best practice, because it uses the 
standard facilities of the DNS protocol to solve the demand.

Len







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