Re: Need of 2 $ORIGIN Directives
On Wed, Dec 21, 2016 at 01:00:22PM +, Ray Bellis wrote:
> On 21/12/2016 12:57, Harshith Mulky wrote:
>
> > So I wanted to understand some things about this Domain
> >
> > A. Why are there 2 $ORIGIN directives?
>
> Because someone thought they were being clever? :)
named itself does this in automatically-generated zone files, but
that's no reason for a human editor of zone files to do the same.
> > B. Can the above be replaced as below
>
> Yes, and you could even remove the trailing `atlanta.com.` on some
> of those records.
>
> > $ORIGIN atlanta.com.
Furthermore this too could be omitted, since:
zone "atlanta.com" IN { ...
a zone statement implicitly sets $ORIGIN to the name of the zone.
> > $TTL 86400 ; 1 day
> > @ IN SOA local.atlanta.com. master.atlanta.com. (
These names could be relative rather than absolute:
@ IN SOA local master (
> > 2001062522 ; serial
> > 21600 ; refresh (6 hours)
> > 3600 ; retry (1 hour)
> > 604800 ; expire (1 week)
> > 86400 ; minimum (1 day)
> > )
> > NS local.atlanta.com.
> > NS kabulvm8.atlanta.com.
and these, likewise.
NS local
NS kabulvm8
> > ;A Records
> > local A 127.0.0.1
> > kabulvm8A 10.54.49.43
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Re: Need of 2 $ORIGIN Directives
A) $ORIGIN changes appended suffix to all hostnames without trailing . for all following records. You can change it more than one time. Unless I am mistaken, NS records of first section would expand to . NS local.atlanta.com. . NS kabulvm8.atlanta.com. That seems wrong to me. B) Yes, it is almost equal. NS records are correct this time. I would prefer this variant myself. However if those zones are output of some tool or script, you should try to support multiple usage of $ORIGIN directive in any tools you use. -- Petr Menšík Software Engineer Red Hat, http://www.redhat.com/ email: pemen...@redhat.com PGP: 65C6C973 - Original Message - From: "Harshith Mulky" <harshith.mu...@outlook.com> To: bind-users@lists.isc.org Sent: Wednesday, December 21, 2016 1:57:35 PM Subject: Need of 2 $ORIGIN Directives Hello, We have bind running bind-9.9.4-29.el7.x86_64 We have a domain file with these configurations and we have to build our A records on top of this $ORIGIN . $TTL 86400 ; 1 day atlanta.com IN SOA local.atlanta.com. master.atlanta.com. ( 2001062522 ; serial 21600 ; refresh (6 hours) 3600 ; retry (1 hour) 604800 ; expire (1 week) 86400 ; minimum (1 day) ) NS local.atlanta.com. NS kabulvm8.atlanta.com. $ORIGIN atlanta.com. $TTL 300 ; 5 minutes local A 127.0.0.1 kabulvm8 A 10.54.49.43 So I wanted to understand some things about this Domain A. Why are there 2 $ORIGIN directives? B. Can the above be replaced as below $ORIGIN atlanta.com. $TTL 86400 ; 1 day @ IN SOA local.atlanta.com. master.atlanta.com. ( 2001062522 ; serial 21600 ; refresh (6 hours) 3600 ; retry (1 hour) 604800 ; expire (1 week) 86400 ; minimum (1 day) ) NS local.atlanta.com. NS kabulvm8.atlanta.com. ;A Records local A 127.0.0.1 kabulvm8 A 10.54.49.43 Thanks Harshith ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: Need of 2 $ORIGIN Directives
On 21/12/2016 12:57, Harshith Mulky wrote: > So I wanted to understand some things about this Domain > > A. Why are there 2 $ORIGIN directives? Because someone thought they were being clever? :) > > B. Can the above be replaced as below Yes, and you could even remove the trailing `atlanta.com.` on some of those records. > $ORIGIN atlanta.com. > $TTL 86400 ; 1 day > @ IN SOA local.atlanta.com. master.atlanta.com. ( > 2001062522 ; serial > 21600 ; refresh (6 hours) > 3600 ; retry (1 hour) > 604800 ; expire (1 week) > 86400 ; minimum (1 day) > ) > NS local.atlanta.com. > NS kabulvm8.atlanta.com. > ;A Records > local A 127.0.0.1 > kabulvm8A 10.54.49.43 Ray ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Need of 2 $ORIGIN Directives
Hello, We have bind running bind-9.9.4-29.el7.x86_64 We have a domain file with these configurations and we have to build our A records on top of this $ORIGIN . $TTL 86400 ; 1 day atlanta.comIN SOA local.atlanta.com. master.atlanta.com. ( 2001062522 ; serial 21600 ; refresh (6 hours) 3600 ; retry (1 hour) 604800 ; expire (1 week) 86400 ; minimum (1 day) ) NS local.atlanta.com. NS kabulvm8.atlanta.com. $ORIGIN atlanta.com. $TTL 300; 5 minutes local A 127.0.0.1 kabulvm8A 10.54.49.43 So I wanted to understand some things about this Domain A. Why are there 2 $ORIGIN directives? B. Can the above be replaced as below $ORIGIN atlanta.com. $TTL 86400 ; 1 day @ IN SOA local.atlanta.com. master.atlanta.com. ( 2001062522 ; serial 21600 ; refresh (6 hours) 3600 ; retry (1 hour) 604800 ; expire (1 week) 86400 ; minimum (1 day) ) NS local.atlanta.com. NS kabulvm8.atlanta.com. ;A Records local A 127.0.0.1 kabulvm8A 10.54.49.43 Thanks Harshith ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
