SOA and PTR Records

[Thor Kottelin]

BIND Users Mailing List wrote:

> From: "Max" <mightymax at yipinet.com>

> so my zone file currently looks like this
> 
> -->    @  IN SOA ns1.zone.com. root.ns1.zone.com.  (
> 
> I was reading the O'Reilly book and their example says to do this:
> 
> -->    zone.com.  IN SOA ns1.zone.com. root.ns1.zone.com.  (
> 
> Which is the correct version???
> 
> And the zone files for my PTR records... should they look like this
> 
> -->    @  IN SOA ns1.zone.com. root.ns1.zone.com.  (
> 
> or like the O'Reilly example
> 
> -->    0.0.127.in-addr.arpa.  IN SOA ns1.zone.com. root.ns1.zone.com.  (

"A free standing @ is used to denote the current origin" (RFC 1035).

You can use $ORIGIN to change the origin, but in most cases, the @ on the
left side of your SOA record will expand to the domain stated in the
configuration file. Thus all four of your examples are correct.

Thor

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