Problems with classless reverse delegation
John Oliver
joliver at john-oliver.net
Fri Jan 3 22:19:48 UTC 2003
Yes, I've been Googling... :-) I think that the ISP that's
authoritative for the addresses in question might be doing something
wrong, but I'm not sure.
I have 209.68.231.0/29 The authoritative DNS server, ns.cts.com,
supposedly has the NS and CNAME records... the hostmaster swears they're
there and correct. Nothing that I do on my end makes this work, but,
then again, I've *never* made this work :-( I just haven't really cared
until now.
My named.conf entry:
zone "0-29.231.68.209.in-addr.arpa" {
type master;
file "zone/231.68.209.0-29";
};
And the zone file:
[joliver at ns joliver]$ cat /var/named/zone/231.68.209.0-29
$TTL 3600
;0-29.231.68.209.in-addr.arpa.
@ IN SOA ns.sdsitehosting.net.
hostmaster.sdsitehosting.net. (
2003010302 ; serial number
3600 1200 1209600 3600 )
IN NS ns.sdsitehosting.net.
1 IN PTR hosting-gw.home.john-oliver.net.
2 IN PTR host2.john-oliver.net.
3 IN PTR host3.john-oliver.net.
4 IN PTR host4.john-oliver.net.
5 IN PTR host5.john-oliver.net.
6 IN PTR broadcast.home.john-oliver.net.
One of the reasons why I think the ISP might have things wrong:
[joliver at ns joliver]$ dig @ns.cts.com -x 209.68.231.2
; <<>> DiG 9.2.1rc1 <<>> @ns.cts.com -x 209.68.231.2
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 39982
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;2.231.68.209.in-addr.arpa. IN PTR
;; Query time: 33 msec
;; SERVER: 192.188.72.18#53(ns.cts.com)
;; WHEN: Fri Jan 3 14:18:44 2003
;; MSG SIZE rcvd: 43
And another:
[joliver at ns joliver]$ nslookup 209.68.231.2
Note: nslookup is deprecated and may be removed from future releases.
Consider using the `dig' or `host' programs instead. Run nslookup with
the `-sil[ent]' option to prevent this message from appearing.
Server: 64.119.217.2
Address: 64.119.217.2#53
** server can't find 2.231.68.209.in-addr.arpa: SERVFAIL
--
John Oliver, CCNA http://www.john-oliver.net/
Linux/UNIX/network consulting http://www.john-oliver.net/resume/
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