Delegate Reverse Zone

[Cedrick]

Hi, I'm trying to delegate a full Class C (10.15.0.0/24) reverse zone on RedHat Ent4/Bind 9.3. Here's the zone file definition in named.conf:

zone "0.15.10.in-addr.arpa" {
type master;
file "internal/named.10.15rev";
};

Here's the contents of named.10.15rev:

$TTL 86400 ; 1 day
@ IN SOA ns1.domain.com. root.ns1.domain.com. (
2010021102 ; serial
3600 ; refresh
300 ; retry
360000 ; expire
86400) ; minimum


$ORIGIN 0.15.10.IN-ADDR.ARPA.
@ IN NS ns2.domain.com.

55 IN CNAME 55.0.15.10.IN-ADDR.ARPA.

66 IN PTR test.domain.com.


I can dig 10.15.0.66 just fine:
; <<>> DiG 9.3.2 <<>> @ns1.domain.com -x 10.15.0.66
; (1 server found)
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 288
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1

;; QUESTION SECTION:
;66.0.15.10.in-addr.arpa. IN PTR

;; ANSWER SECTION:
66.0.15.10.in-addr.arpa. 86400 IN PTR test.domain.com.

;; AUTHORITY SECTION:
0.15.10.in-addr.arpa. 86400 IN NS ns2.domain.com.

;; ADDITIONAL SECTION:
ns2.domain.com 3600 IN A 10.1.16.130

;; Query time: 0 msec
;; SERVER: 10.1.16.130#53(10.1.16.130)
;; WHEN: Thu Feb 11 16:07:43 2010
;; MSG SIZE rcvd: 102

But if I dig 10.15.0.55, the AUTHORITY flag returns 0 as if it doesn't see the $ORIGIN statement in the zone file:

; <<>> DiG 9.3.2 <<>> @ns1.domain.com -x 10.15.0.55
; (1 server found)
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 323
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;55.0.15.10.in-addr.arpa. IN PTR

;; ANSWER SECTION:
55.0.15.10.in-addr.arpa. 86400 IN CNAME 55.0.15.10.in-addr.arpa.

;; Query time: 0 msec
;; SERVER: 10.1.16.130#53(10.1.16.130)
;; WHEN: Thu Feb 11 16:12:52 2010
;; MSG SIZE rcvd: 55

Any ideas? Thanks in advance.

 

[elgrandeperro]

is 10.15.0 delegated to you in 10.15, with a NS record?

 

[Cedrick]

I started out trying to delegate the entire 10.15.0.0/16 network with the same results using this def. in named.conf:

zone "15.10.in-addr.arpa" {
type master;
file "internal/named.10.15rev";
};

And this in the zone file:

$ORIGIN 15.10.IN-ADDR.ARPA.
@ IN NS ns2.domain.com.

55.0 IN CNAME 55.0.15.10.IN-ADDR.ARPA.

66.0 IN PTR test.domain.com.

 

[elgrandeperro]

There are 2 ways to do this. One is the classical method,
which I prefer if you control the top level:

IN 15.10.in-addr.arpa:

0 in NS ns1.domain.com.

IN 0.15.10.in-add.arpa of ns1:

66 IN PTR test.domain.com.

The other is a CNAME trick that ISPs use so they can split
up the zone. They take a namein in-addr.arpa. space and delegate that space to your server.

I don't use this method much, but it does work.

 

[elgrandeperro]

Oh, BTW, with the CNAME method you
would STILL need to delegate the namespace to
ns1.

 

[Cedrick]

Got it. Thank you very much, I really appreciate it.