Classless PTR query issue
Michael Varre
mvarre at gmail.com
Tue May 7 16:52:16 UTC 2013
On Tuesday, May 7, 2013 12:04:10 PM UTC-4, Justin T Pryzby wrote:
> I recommend "dig +trace -x" on one of your assigned IPs. Compare with
>
> the result from a known-good sub-24 rev dns delegation. The ISP
>
> should be returning something like:
>
>
>
> 162.48.168.205.in-addr.arpa. 43200 IN CNAME 162.160-175.48.168.205.in-addr.arpa.
>
> 160-175.48.168.205.in-addr.arpa. 43200 IN NS ns.norchemlab.com.
>
> 160-175.48.168.205.in-addr.arpa. 43200 IN NS ns1.norchemlab.com.
>
>
>
> and your NS should respond for the 160-175 zone. The particular
>
> naming convention doesn't matter, but has to be consistent between you
>
> and your ISP. The filename of the zone doesn't need to match the zone
>
> name, although that seems to be a popular misconception.. Slashes (as
>
> in 160/28.48.168.205.in-addr.arpa) are mildly inconvenient convention
>
> since, if the filename and zone DO match, they imply use of a
>
> subdirectory.
>
>
>
> Good luck,
>
> Justin
Thanks Justin, I've been testing with dig and that's how I got the failed results posted previously. My digs lead me to believe their zones are named the same as mine, with -'s instead of /'s.
dig -x 1.1.1.90 +trace
----snipped----
;; Received 180 bytes from 199.253.183.183#53(b.in-addr-servers.arpa) in 89 ms
1.1.1.in-addr.arpa. 86400 IN NS NS1.myisp.COM.
1.1.1.in-addr.arpa. 86400 IN NS NS2.myisp.COM.
;; Received 89 bytes from 199.180.180.63#53(r.arin.net) in 55 ms
90.1.1.1.in-addr.arpa. 3600 IN NS dns1.myns.com.
;; Received 75 bytes from 13.13.13.13#53(NS1.myisp.COM) in 84 ms
;; Received 44 bytes from 1.1.1.90#53(dns1.myns.com) in 80 ms
<end>
I've requested they confirm their setup, but I don't know how forthcoming they'll be.
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