Reverse DNS delegation

[KWIKIE]

Hello All

I have just set up a Reverse DNS delegation for a customer of ours. I have set up a range with 64 host addresses and assigned that range to our names servers. We then pass across the delgation by using a REV_ZONE entry with CNAMES for each address this is below;


$TTL 3w
123.123.99.in-addr.arpa. IN SOA ns1.doughnut.com. webmaster.doughnut.com. (
2008051507 ; Serial
3h ; Refresh after 3 hrs
1h ; Retry after 1 hour
3w ; Expire after 3 weeks
1h ) ; Negative caching TTL of 1 hour

;
; Name Servers
;


123.123.99.in-addr.arpa. IN NS ns.doughnut.com
123.123.99.in-addr.arpa. IN NS ns4.doughnut.com.
123.123.99.in-addr.arpa. IN NS ns.doughnut.com.
123.123.99.in-addr.arpa. IN NS ns2.doughnut.com.

;
; Address point to canonical names
;

1 CNAME 1.0.123.123.99.in-addr.arpa.
2 CNAME 2.0.123.123.99.in-addr.arpa.
3 CNAME 3.0.123.123.99.in-addr.arpa.
4 CNAME 4.0.123.123.99.in-addr.arpa.
5 CNAME 5.0.123.123.99.in-addr.arpa.
6 CNAME 6.0.123.123.99.in-addr.arpa.
7 CNAME 7.0.123.123.99.in-addr.arpa.
8 CNAME 8.0.123.123.99.in-addr.arpa.
9 CNAME 9.0.123.123.99.in-addr.arpa.
10 CNAME 10.0.123.123.99.in-addr.arpa.
11 CNAME 11.0.123.123.99.in-addr.arpa.
12 CNAME 12.0.123.123.99.in-addr.arpa.
13 CNAME 13.0.123.123.99.in-addr.arpa.
14 CNAME 14.0.123.123.99.in-addr.arpa.
15 CNAME 15.0.123.123.99.in-addr.arpa.
16 CNAME 16.0.123.123.99.in-addr.arpa.
17 CNAME 17.0.123.123.99.in-addr.arpa.
18 CNAME 18.0.123.123.99.in-addr.arpa.
19 CNAME 19.0.123.123.99.in-addr.arpa.
20 CNAME 20.0.123.123.99.in-addr.arpa.
21 CNAME 21.0.123.123.99.in-addr.arpa.
22 CNAME 22.0.123.123.99.in-addr.arpa.
23 CNAME 23.0.123.123.99.in-addr.arpa.
24 CNAME 24.0.123.123.99.in-addr.arpa.
25 CNAME 25.0.123.123.99.in-addr.arpa.
26 CNAME 26.0.123.123.99.in-addr.arpa.
27 CNAME 27.0.123.123.99.in-addr.arpa.
28 CNAME 28.0.123.123.99.in-addr.arpa.
29 CNAME 29.0.123.123.99.in-addr.arpa.
30 CNAME 30.0.123.123.99.in-addr.arpa.
31 CNAME 31.0.123.123.99.in-addr.arpa.
32 CNAME 32.0.123.123.99.in-addr.arpa.
33 CNAME 33.0.123.123.99.in-addr.arpa.
34 CNAME 34.0.123.123.99.in-addr.arpa.
35 CNAME 35.0.123.123.99.in-addr.arpa.
36 CNAME 36.0.123.123.99.in-addr.arpa.
37 CNAME 37.0.123.123.99.in-addr.arpa.
38 CNAME 38.0.123.123.99.in-addr.arpa.
39 CNAME 39.0.123.123.99.in-addr.arpa.
40 CNAME 40.0.123.123.99.in-addr.arpa.
41 CNAME 41.0.123.123.99.in-addr.arpa.
42 CNAME 42.0.123.123.99.in-addr.arpa.
43 CNAME 43.0.123.123.99.in-addr.arpa.
44 CNAME 44.0.123.123.99.in-addr.arpa.
45 CNAME 45.0.123.123.99.in-addr.arpa.
46 CNAME 46.0.123.123.99.in-addr.arpa.
47 CNAME 47.0.123.123.99.in-addr.arpa.
48 CNAME 48.0.123.123.99.in-addr.arpa.
49 CNAME 49.0.123.123.99.in-addr.arpa.
50 CNAME 50.0.123.123.99.in-addr.arpa.
51 CNAME 51.0.123.123.99.in-addr.arpa.
52 CNAME 52.0.123.123.99.in-addr.arpa.
53 CNAME 53.0.123.123.99.in-addr.arpa.
54 CNAME 54.0.123.123.99.in-addr.arpa.
55 CNAME 55.0.123.123.99.in-addr.arpa.
56 CNAME 56.0.123.123.99.in-addr.arpa.
57 CNAME 57.0.123.123.99.in-addr.arpa.
58 CNAME 58.0.123.123.99.in-addr.arpa.
59 CNAME 59.0.123.123.99.in-addr.arpa.
60 CNAME 60.0.123.123.99.in-addr.arpa.
61 CNAME 61.0.123.123.99.in-addr.arpa.
62 CNAME 62.0.123.123.99.in-addr.arpa.

The RIPE delegation is fine and when I try to dig on a name server outside our network I get back the answer of;

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

;; ANSWER SECTION:
41.123.123.99.in-addr.arpa. 604800 IN CNAME 41.0.123.123.99.in-addr.arpa.

It does not come back with the correct name record from the servers at the compnays site. This ghad been previously working but suddenly stopped. If there is any chance some one can glance over the zone file and see if they can see any thing wrong, I would be most greatful. If you need to know any more information please reply and I willl respond staright away.

Fank you very much.

 

[jyorgey]

The first thing you need to do is to change the CNAME records you have to the following:

1 IN CNAME 1.0-63.123.123.99.in-addr.arpa.
2 IN CNAME 2.0-63.123.123.99.in-addr.arpa.

And in your 123.123.99.in-addr.arpa zone file you will need to add the following NS records:

0-63.123.123.99.in-addr.arpa. IN NS ns1.customer’s server.com.
0-63.123.123.99.in-addr.arpa. IN NS ns2.customer’s server.com.

Your customer will have to create the zone 0-63.123.123.99.in-addr.arpa. In that file they need to create the records like the this:

1.0-63.123.123.99.in-addr.arpa. IN PTR something.customer.com.
2.0-63.123.123.99.in-addr.arpa. IN PTR somethingelse.customer.com.


Or

1 IN PTR something.customer.com.
2 IN PTR somethingelse.customer.com.