Lookup weirdness

[Barry Margolin]

In article <cnm7eg$23ic$1 at sf1.isc.org>, Jim Reid <jim at rfc1035.com> 
wrote:

> >>>>> "Mike" == Mike B <toastyhamster at hotmail.com> writes:
> 
> 
>     Mike> Ok, this has me baffled.  I'm running a primary/secondary
>     Mike> DNS server, neither are able to resolve anything in the
>     Mike> 152.158 domain (the example I am using is
>     Mike> 152.158.16.48). Everywhere else on the 'Net I have tried
>     Mike> can. The only anomaly I can find is that www.dnsstuff.com
>     Mike> occasionally shows a bad delegation, this is a fault of one
>     Mike> of the ARIN servers, which is delegating it to a now
>     Mike> decommissioned ibm.net server.
> 
> This is not "a fault of one of the ARIN servers". ARIN's name servers
> are only responding with the data they've been given. Garbage in,
> garbage out. The responsibility for that problem doesn't rest with
> ARIN either. The 158.152.in-addr.arpa zone administrator has screwed
> up the delegation of this zone.
> 
> They have told ARIN to delegate the zone to ns01.ca.us.ibm.net, a
> name that doesn't exist, and ns1.us.prserv.net, which does not answer
> authoritatively for this zone. So it's no wonder reverse lookups for
> 152.158/16 are not working. Nobody can find authoritative name servers
> for 158.152.in-addr.arpa. It looks like zone administrator has changed
> the name servers for the zone and forgotten to tell ARIN so that the
> delegation info in the parent zone gets changed.

It answered authoritatively when I tried it:

$ dig -x 152.158 any @ns1.us.prserv.net +norec

; <<>> DiG 9.2.2 <<>> -x 152.158 any @ns1.us.prserv.net +norec
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 55715
;; flags: qr aa ra; QUERY: 1, ANSWER: 5, AUTHORITY: 4, ADDITIONAL: 4

;; QUESTION SECTION:
;158.152.in-addr.arpa.     IN ANY

;; ANSWER SECTION:
158.152.in-addr.arpa.   86400 IN NS ns1.us.prserv.net.
158.152.in-addr.arpa.   86400 IN NS ns4.us.prserv.net.
158.152.in-addr.arpa.   86400 IN NS ns3.us.prserv.net.
158.152.in-addr.arpa.   86400 IN NS ns3.prserv.net.
158.152.in-addr.arpa.   86400 IN SOA   master.us.prserv.net. 
dns.us.ibm.com. 993751088 10800 3600 604800 86400

;; AUTHORITY SECTION:
158.152.in-addr.arpa.   86400 IN NS ns1.us.prserv.net.
158.152.in-addr.arpa.   86400 IN NS ns4.us.prserv.net.
158.152.in-addr.arpa.   86400 IN NS ns3.us.prserv.net.
158.152.in-addr.arpa.   86400 IN NS ns3.prserv.net.

;; ADDITIONAL SECTION:
ns1.us.prserv.net.   14400 IN A  165.87.194.244
ns4.us.prserv.net.   14400 IN A  165.87.201.244
ns3.us.prserv.net.   14400 IN A  165.87.201.243
ns3.prserv.net.      86400 IN A  165.87.201.243

;; Query time: 116 msec
;; SERVER: 165.87.194.244#53(ns1.us.prserv.net)
;; WHEN: Sat Nov 20 08:59:34 2004
;; MSG SIZE  rcvd: 300

-- 
Barry Margolin, barmar at alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***