Is this scenario possible?

Blason R blason16 at gmail.com
Sun Jan 12 03:33:49 UTC 2014


Oh yeah you are right...I missed that out :)

Thanks for pointing it out..


On Sun, Jan 12, 2014 at 2:03 AM, Barry Margolin <barmar at alum.mit.edu> wrote:

> In article <mailman.1996.1389470377.20661.bind-users at lists.isc.org>,
>  Blason R <blason16 at gmail.com> wrote:
>
> > Hey all,
> >
> > Pertaining to the same discussion. Can someone validate below zone files
> > and named.conf files? What I wanted to achieve here is; I wanted to make
> > mail.example.com as my sub domain and give them A record so that I could
> > load balance the traffic on LBs since my LBs are offering inbuilt DNS
> server
> >
> > example.com
> > NS = ns1.example.com 1.1.1.1
> > ns2.example.com 2.2.2.2
> >
> > #############################################
> > #
> > # example.com MAIN ZONE FILE
> > #
> > #############################################
> > zone "example.com" in{
> >   type master;
> >   file "master/master.example.com";
> >   // explicitly allow slave zone transfer
> >   allow-transfer {2.2.2.2;};
> > };
> >
> >
> > ##################################
> > #
> > # master.example.com
> > ##################################
> > $TTL 2d
> > $ORIGIN example.com.
> > @              IN      SOA   ns1.example.com. hostmaster.example.com. (
> >                2003080800 ; serial number
> >                2h         ; refresh =  2 hours
> >                15M        ; update retry = 15 minutes
> >                3W12h      ; expiry = 3 weeks + 12 hours
> >                2h20M      ; minimum = 2 hours + 20 minutes
> >                )
> >
> >               IN      NS     ns1.example.com.
> >               IN      NS     ns2.example.com.
> >
> >               IN      MX     10 mx01.example.com.
> > IN MX 20 mx02.example.com.
> >
> > ns1           IN      A      1.1.1.1
> > ns2           IN      A      2.2.2.2
> > ; A record for mail server above
> > mx01           IN      A      20.20.20.20
> > mx02 IN A 30.30.30.30
> >
> > #######################################################
> >
> > $ORIGIN mail.example.com.
> >
> > @             IN      NS     ns3.mail.example.com.
> >
> > ; the next name server points to ns1 in the example.com zone above
> >               IN      NS     ns1.example.com.
> > ; sub-domain address records for name server only - glue record
> > ns3           IN      A      20.20.20.21 ; 'glue' record
> >
> > ******************************************************
> > ******************************************************
> > #############################################
> > #
> > # mail.example.com MAIN ZONE FILE
> > #
> > #############################################
> > zone "mail.example.com" in{
> > type master;
> > file "master/master.mail.example.com";
> >
> > };
> >
> > #############################################
> > # mail.example.com zone file
> > #############################################
> > #
> >
> > $TTL 2d ; default TTL = 2 days
> > $ORIGIN mail.example.com.
> > @              IN     SOA   ns3.mail.example.com.
> > hostmaster.mail.example.com. (
> >                2003080800 ; serial number
> >                2h         ; refresh =  2 hours
> >                15M        ; update retry = 15 minutes
> >                3W12h      ; expiry = 3 weeks + 12 hours
> >                2h20M      ; minimum = 2 hours + 20 minutes
> >                )
> > ; sub-domain name servers
> >                   IN      NS     ns3.mail.example.com.
>
> You also need:
>
>                     IN      NS     ns1.example.com.
>
> >
> > ; A records for name servers above
> > ns3               IN      A      20.20.20.21
> >
> > ; A record for mail server above
> > mail               IN      A      20.20.20.20
> > mail IN A 30.30.30.30
>
> These will create A records for mail.mail.example.com. Is that what you
> wanted? If you just want mail.example.com, it should be:
>
> @  IN A 20.20.20.21
>    IN A 30.30.30.30
>
> --
> Barry Margolin
> Arlington, MA
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