[Best practice] Internal zone
Matthew Seaman
m.seaman at infracaninophile.co.uk
Tue Nov 15 13:44:10 UTC 2011
On 15/11/2011 12:50, Jeremy MAURO wrote:
> I asking you all for you best practice regarding your internal DNS and
> zones.
>
> I have a 2 DNS servers used as Internal DNS and Resolvers, here is the
> dilemma, should I declare in each internal zone my NS with a glue record:
>
> $ORIGIN example.internal.
> ; NS records
> IN NS ns1
> IN NS ns2
> ns1 IN A 10.10.10.10
> ns2 IN A 10.10.10.11
>
>
> Or should I point toward the NS server from my principal zone:
>
> $ORIGIN example.internal.
> ; NS records
> IN NS ns1.principal.internal.
> IN NS ns2.principal.internal.
>
>
> Which one of those 2 samples is the best one and the closer from the
> RFCs? As far as I know, the second sample should be the best one since
> the RFC 1912 says "Some people get in the bad habit of putting in a glue
> record whenever they add an NS record 'just to make sure'."
>
> Any opinion is approached.
If you've already got A (and PTR) records set up for your nameservers,
then there's no advantage to adding more A records in each zonefile.
Especially given that all those zones are served from the same set of
authoritative servers.
Having one A record for each nameserver makes it much easier if you ever
need to renumber the server.
In a more complex setup with different zones distributed over various
different sets of internal servers, having a unique A record for each
server makes it much clearer which server is actually serving which zone.
Cheers,
Matthew
--
Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard
Flat 3
PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate
JID: matthew at infracaninophile.co.uk Kent, CT11 9PW
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