problem with reverses and dynamic updates.

[Bob Vance]

2 possible things to look at:


1) see whether your DHCP server supports specifying the zone to DDNS
update.

   E.g., the ISC 'dhcpd' allows you to config the zones for the DDNS.  I
specify "dynamic.blah.com." for *both* the forward and the reverse so
there is only one dynamic zone being updated.
Then my reverse zone does that CNAME thingy into the dynamic zone.


2) if all you want to do is to separate the dynamic reverse updates from
the static zone, e.g., to be able to edit and format the static zone as
you like, then a limited kludge would be to use the main zone for the
dynamics and move the statics out of the zone !!

;;$ORIGIN  48.104.155.in-addr.arpa.
@   IN  SOA ...
     ...
;; static aliases :
$GENERATE 1-126  $      CNAME $.0-25.blah.com.
;; the dynamic would be added hereinafter as they occur
;; and formatting (like these comments :) will be lost

In the above example, you then have to create a sub-zone,
"0-25.blah.com"
of the forward zone to house the "real" PTRs.

Or, IMHO and depending on the complexity of your situation, even better
would be to put the static PTRs into the forward zone, right next to
their corresponding A records -- no subzones, delegations, or NS records
:

;;$ORIGIN  48.104.155.in-addr.arpa.
@   IN  SOA ...
     ...
$GENERATE 1-126  $      CNAME $.blah.com.

and in db.blah.com. :


;;$ORIGIN  blah.com.
@   IN  SOA ...
     ...
foo   IN   A   155.104.48.10
10    IN   PTR foo
bar   IN   A   155.104.48.11
11    IN   PTR bar
   ...


-------------------------------------------------
Tks        | <mailto:BVance at sbm.com>
BV         | <mailto:BobVance at alumni.caltech.edu>
Sr. Technical Consultant,  SBM, A Gates/Arrow Co.
Vox 770-623-3430           11455 Lakefield Dr.
Fax 770-623-3429           Duluth, GA 30097-1511
=================================================





-----Original Message-----
From: bind-users-bounce at isc.org [mailto:bind-users-bounce at isc.org]On
Behalf Of Kevin Darcy
Sent: Wednesday, March 14, 2001 4:54 PM
To: bind-users at isc.org
Subject: Re: problem with reverses and dynamic updates.



Looks like a simple case of the Dynamic Update client not being smart
enough to
handle aliases. Which client is this, by the way? I know the Windows
2000 client
is somewhat CNAME-challenged...


- Kevin

Pat Masterson wrote:

> My named.conf has a 48.104.15.in-addr.arpa which I want to split into
two
> halves. One for statics, one for reverses.
>  In this file I have "allow-update none" and 2 NS records for the RFC
> 2317 sub zones.
>  There is an
> 0-25  NS  <name server>
> 1     cname  1.0-25.48.104.15.in-addr.arpa.
> 2     cname  2.0-25......
>  etc.
>
> And
>
> 128-25  NS  <name server>
> 128   cname  128.128-25.48.104.155.in-addr.arpa.
> 129   cname  129.128-25.48.... etc.
>
> Problem is, the dynamic updates go right into the parent zone
> 48.104.155.in-addr.arpa and not into the correct subzone. So I get
"update
> denied" . What am I doing wrong?
>
> Apologies for not attaching al the files; the machine is in a lab with
no
> Net access, and I ave to type everything by hand. -pat
>
>
*-----------------------------------------------------------------------
------*
> *  Pat Masterson  B38-01,  Northrop Grumman,     *  Ham:KE2LJ
> *  20 Orville Road,                              *  President Grumman
Amateur
> *  Bohemia,  NY                                  *  Radio Club  WA2LQO
> *  email: bat at grumman.com   Fone: 631-218-6746   *  www.qsl.net/wa2lqo
>
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