[dns-operations] broken reverse DNS for 192.203.230.10 (e-root)

[Robert Edmonds]

230.203.192.in-addr.arpa, the zone that should hold the IPv4 PTR for
e.root-servers.net, is broken.

    edmonds at chase{0}:~$ dig +trace +norec @f.root-servers.net -x 192.203.230.10

    ; <<>> DiG 9.7.1-P2 <<>> +trace +norec @f.root-servers.net -x 192.203.230.10
    ; (2 servers found)
    ;; global options: +cmd
    .           518400  IN  NS  f.root-servers.net.
    .           518400  IN  NS  l.root-servers.net.
    .           518400  IN  NS  i.root-servers.net.
    .           518400  IN  NS  h.root-servers.net.
    .           518400  IN  NS  j.root-servers.net.
    .           518400  IN  NS  b.root-servers.net.
    .           518400  IN  NS  d.root-servers.net.
    .           518400  IN  NS  k.root-servers.net.
    .           518400  IN  NS  a.root-servers.net.
    .           518400  IN  NS  m.root-servers.net.
    .           518400  IN  NS  g.root-servers.net.
    .           518400  IN  NS  e.root-servers.net.
    .           518400  IN  NS  c.root-servers.net.
    ;; Received 492 bytes from 2001:500:2f::f#53(2001:500:2f::f) in 111 ms

    arpa.           172800  IN  NS  k.root-servers.net.
    arpa.           172800  IN  NS  h.root-servers.net.
    arpa.           172800  IN  NS  d.root-servers.net.
    arpa.           172800  IN  NS  c.root-servers.net.
    arpa.           172800  IN  NS  g.root-servers.net.
    arpa.           172800  IN  NS  i.root-servers.net.
    arpa.           172800  IN  NS  e.root-servers.net.
    arpa.           172800  IN  NS  l.root-servers.net.
    arpa.           172800  IN  NS  b.root-servers.net.
    arpa.           172800  IN  NS  a.root-servers.net.
    arpa.           172800  IN  NS  m.root-servers.net.
    arpa.           172800  IN  NS  f.root-servers.net.
    ;; Received 509 bytes from 2001:503:c27::2:30#53(j.root-servers.net) in 32 ms

    192.in-addr.arpa.   86400   IN  NS  X.ARIN.NET.
    192.in-addr.arpa.   86400   IN  NS  Z.ARIN.NET.
    192.in-addr.arpa.   86400   IN  NS  DILL.ARIN.NET.
    192.in-addr.arpa.   86400   IN  NS  T.ARIN.NET.
    192.in-addr.arpa.   86400   IN  NS  Y.ARIN.NET.
    192.in-addr.arpa.   86400   IN  NS  W.ARIN.NET.
    192.in-addr.arpa.   86400   IN  NS  U.ARIN.NET.
    192.in-addr.arpa.   86400   IN  NS  V.ARIN.NET.
    ;; Received 184 bytes from 192.112.36.4#53(g.root-servers.net) in 141 ms

    230.203.192.in-addr.arpa. 86400 IN  NS  ns1.nasa.gov.
    230.203.192.in-addr.arpa. 86400 IN  NS  ns3.nasa.gov.
    230.203.192.in-addr.arpa. 86400 IN  NS  ns2.nasa.gov.
    ;; Received 107 bytes from 2001:500:13::63#53(Z.ARIN.NET) in 31 ms

    .           3600000 IN  NS  B.ROOT-SERVERS.NET.
    ;; BAD REFERRAL
    ;; Received 76 bytes from 198.116.4.185#53(ns2.nasa.gov) in 103 ms

in fact, ns[123].nasa.gov return nonsensical responses for
230.203.192.in-addr.arpa:

    edmonds at chase{0}:~$ dig +norec @ns1.nasa.gov -x 192.203.230.10

    ; <<>> DiG 9.7.1-P2 <<>> +norec @ns1.nasa.gov -x 192.203.230.10
    ; (1 server found)
    ;; global options: +cmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 23597
    ;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

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

    ;; AUTHORITY SECTION:
    .           3600000 IN  NS  A.ROOT-SERVERS.NET.

    ;; Query time: 109 msec
    ;; SERVER: 198.116.4.189#53(198.116.4.189)
    ;; WHEN: Thu Aug 26 15:49:52 2010
    ;; MSG SIZE  rcvd: 76

    edmonds at chase{0}:~$ dig +norec @ns2.nasa.gov -x 192.203.230.10

    ; <<>> DiG 9.7.1-P2 <<>> +norec @ns2.nasa.gov -x 192.203.230.10
    ; (1 server found)
    ;; global options: +cmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10770
    ;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

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

    ;; AUTHORITY SECTION:
    .           3600000 IN  NS  B.ROOT-SERVERS.NET.

    ;; Query time: 101 msec
    ;; SERVER: 198.116.4.185#53(198.116.4.185)
    ;; WHEN: Thu Aug 26 15:49:55 2010
    ;; MSG SIZE  rcvd: 76

    edmonds at chase{0}:~$ dig +norec @ns3.nasa.gov -x 192.203.230.10

    ; <<>> DiG 9.7.1-P2 <<>> +norec @ns3.nasa.gov -x 192.203.230.10
    ; (1 server found)
    ;; global options: +cmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 18589
    ;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

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

    ;; AUTHORITY SECTION:
    .           3600000 IN  NS  C.ROOT-SERVERS.NET.

    ;; Query time: 87 msec
    ;; SERVER: 198.116.4.181#53(198.116.4.181)
    ;; WHEN: Thu Aug 26 15:49:57 2010
    ;; MSG SIZE  rcvd: 76

    edmonds at chase{0}:~$ 

-- 
Robert Edmonds
edmonds at isc.org