Significance of @ symbol in soa record.
Mark_Andrews at isc.org
Mark_Andrews at isc.org
Sat Jan 11 01:25:07 UTC 2003
>
> colors wrote:
>
> > I am trying to learn about the significance of the '@' symbol at the start
> > of the line where the soa record is contained.
> >
> > Upon looking for examples and explanation, I have found two conventions:
> >
> > The @ symbol
> > The domain name (for example, domain.com.)
> >
> > The references using the domain name seem to be older examples, whereas the
> > @ symbol I seem to be finding in newer examples.
> >
> > I am also wondering why one might want to have a ttl for a zone's soa recor
> d
> > set at 60 seconds..?
>
> @ is just shorthand for the zone origin. Semantically, they're the same thing
> .
@ is short hand for the *current* origin. The origin is initialised
to the name of the zone but can be changed via $ORIGIN. It is also
reset when returning from a $INCLUDE.
Mark
>
>
> - Kevin
>
>
>
--
Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark.Andrews at isc.org
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