Confused about what $ORIGIN does in relation to @

[Ryan McCain]

Gotcha.

Why would my zone file have 2 $ORIGIN directives?  And how does the @ in the SOA record relate to the $ORIGIN directive?

Thanks..


>>> On Tue, Sep 11, 2007 at  1:38 PM, in message
<4F19260FE7477F4DA03B00B62E7F63903DA55189A9 at CHERRYPEPSI.uwec.edu>, "Paine,
Thomas Asa" <PAINETA at uwec.edu> wrote: 
> Ryan,
> 
>         The $ORIGIN directive will get appended to any owner or record data 
> (like cnames) which are not already fully qualified.
> 
> So in the case of say "acess", it does not have a trailing . so it would 
> become acess.$ORIGIN or acess.dss.state.la.us.
> 
> By commenting it out, you in essence turned acess into a toplevel acess. 
> Since the only previous $ORIGIN statement was .
> 
> In slave databases you'll see an $ORIGIN directive anytime there is a change 
> the domain portion of the owners.
> 
> i.e.
> 
> $ORIGIN foobar.com.
> www             ......
> $ORIGIN hr.foobar.com.
> www             ......
> 
> 
> That help?
> 
> 
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
>    Thomas Paine {paineta at uwec.edu)}
>    University of Wisconsin - Eau Claire
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> 
> -----Original Message-----
> From: bind-users-bounce at isc.org [mailto:bind-users-bounce at isc.org] On Behalf Of 
> Ryan McCain
> Sent: Tuesday, September 11, 2007 1:00 PM
> To: bind-users at isc.org
> Subject: Confused about what $ORIGIN does in relation to @
> 
> This is another post in my attempt to gain knowledge of BIND.  Here is the 
> top of one of my zone files:
> 
> $ORIGIN .
> $TTL 3600       ; 1 hour
> dss.state.la.us         IN SOA  dssns.dss.state.la.us. 
> rmccain.dss.state.la.us (
>                                 2007091103        ; serial
>                                 1200        ; refresh (20 minutes)
>                                 600        ; retry (10 minutes)
>                                 1209600    ; expire (2 weeks)
>                                 3600       ; minimum (1 hour)
>                                 )
>                         NS      dssns.dss.state.la.us.
>                         NS      dssns2.dss.state.la.us.
>                         A       205.172.49.49
>                         MX      10 smtp-ext1.dss.state.la.us.
>                         MX      20 smtp-ext2.dss.state.la.us.
> $ORIGIN dss.state.la.us.
> acess                   A       205.172.49.23
> acess-info              A       205.172.49.23
> acspoc                  A       205.172.49.9
> 
> 
> I have the O'Reilly BIND book but it doesn't really clarify what the $ORIGIN 
> statement is doing.  This zone file was created when the server was acting as 
> a slave to a master Microsoft DNS server.
> 
> What confuses me is I have 2 $ORIGIN statements.  I am assuming this is 
> repetitive however, I'm not 100% sure.
> 
> I changed the zone file to comment out the 2nd $ORIGIN statement:
> 
> 
> $ORIGIN .
> $TTL 3600       ; 1 hour
> dss.state.la.us         IN SOA  dssns.dss.state.la.us. 
> rmccain.dss.state.la.us (
>                                 2007091103        ; serial
>                                 1200        ; refresh (20 minutes)
>                                 600        ; retry (10 minutes)
>                                 1209600    ; expire (2 weeks)
>                                 3600       ; minimum (1 hour)
>                                 )
>                         NS      dssns.dss.state.la.us.
>                         NS      dssns2.dss.state.la.us.
>                         A       205.172.49.49
>                         MX      10 smtp-ext1.dss.state.la.us.
>                         MX      20 smtp-ext2.dss.state.la.us.
> ;$ORIGIN dss.state.la.us.
> acess                   A       205.172.49.23
> acess-info              A       205.172.49.23
> acspoc                  A       205.172.49.9
> 
> 
> and also tried it by changing the first $ORIGIN statement:
> 
> $ORIGIN dss.state.la.us.
> $TTL 3600       ; 1 hour
> dss.state.la.us         IN SOA  dssns.dss.state.la.us. 
> rmccain.dss.state.la.us (
>                                 2007091103        ; serial
>                                 1200        ; refresh (20 minutes)
>                                 600        ; retry (10 minutes)
>                                 1209600    ; expire (2 weeks)
>                                 3600       ; minimum (1 hour)
>                                 )
>                         NS      dssns.dss.state.la.us.
>                         NS      dssns2.dss.state.la.us.
>                         A       205.172.49.49
>                         MX      10 smtp-ext1.dss.state.la.us.
>                         MX      20 smtp-ext2.dss.state.la.us.
> ;$ORIGIN dss.state.la.us.
> acess                   A       205.172.49.23
> acess-info              A       205.172.49.23
> acspoc                  A       205.172.49.9
> 
> 
> ..Both produced weird errors when I queried the domain via dnsstuff.com.
> 
> Can someone clarify where my $ORIGIN statement should be and also can I 
> change dss.state.la.us in the SOA record to just @?
> 
> Thanks again for everyones help..