DNS anomaly

Roger Keays r.keays at ninthave.net
Wed Jul 23 21:59:37 UTC 2003


Barry,

Thanks for the reply,

> I think 61.9.208.24 may have more general routing problems.  I can't get a
> response from it for either query.  And when I traceroute to it, I
> encounter a routing loop between a pair of 192.168 addresses.

Hmmm... I am now also getting no responses from that server, although it 
is the address that the Telstra support gave me. The servers on their 
web site are 139.134.5.51 and 139.134.2.190 which exhibit the behaviour 
from my first post:

*** Telstra DNS ***
roger at schema:/home/roger$ dig ninthave.net @139.134.5.51 any

; <<>> DiG 9.2.2 <<>> ninthave.net @139.134.5.51 any
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 46909
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 4, ADDITIONAL: 0

;; QUESTION SECTION:
;ninthave.net.                  IN      ANY

;; ANSWER SECTION:
ninthave.net.           33556   IN      NS      a.ns.ninthave.net.
ninthave.net.           33556   IN      NS      b.ns.ninthave.net.
ninthave.net.           33556   IN      NS      c.ns.ninthave.net.
ninthave.net.           33556   IN      NS      d.ns.ninthave.net.

;; AUTHORITY SECTION:
ninthave.net.           33556   IN      NS      a.ns.ninthave.net.
ninthave.net.           33556   IN      NS      b.ns.ninthave.net.
ninthave.net.           33556   IN      NS      c.ns.ninthave.net.
ninthave.net.           33556   IN      NS      d.ns.ninthave.net.

;; Query time: 20 msec
;; SERVER: 139.134.5.51#53(139.134.5.51)
;; WHEN: Thu Jul 24 07:28:51 2003
;; MSG SIZE  rcvd: 153

*** Optus DNS ***
roger at schema:/home/roger$ dig ninthave.net @203.2.75.132 any

; <<>> DiG 9.2.2 <<>> ninthave.net @203.2.75.132 any
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 32326
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 4, ADDITIONAL: 4

;; QUESTION SECTION:
;ninthave.net.                  IN      ANY

;; ANSWER SECTION:
ninthave.net.           189946  IN      NS      c.ns.ninthave.net.
ninthave.net.           189946  IN      NS      d.ns.ninthave.net.
ninthave.net.           189946  IN      NS      a.ns.ninthave.net.
ninthave.net.           189946  IN      NS      b.ns.ninthave.net.

;; AUTHORITY SECTION:
ninthave.net.           189946  IN      NS      a.ns.ninthave.net.
ninthave.net.           189946  IN      NS      b.ns.ninthave.net.
ninthave.net.           189946  IN      NS      c.ns.ninthave.net.
ninthave.net.           189946  IN      NS      d.ns.ninthave.net.

;; ADDITIONAL SECTION:
a.ns.ninthave.net.      189946  IN      A       194.153.169.15
b.ns.ninthave.net.      189946  IN      A       194.153.169.31
c.ns.ninthave.net.      189946  IN      A       212.100.225.215
d.ns.ninthave.net.      189946  IN      A       212.13.198.12

;; Query time: 37 msec
;; SERVER: 203.2.75.132#53(203.2.75.132)
;; WHEN: Thu Jul 24 07:29:45 2003
;; MSG SIZE  rcvd: 217


> 
> Are you sure that's one of Telstra's DNS servers?  It translates to
> CPE-61-9-208-24.qld.bigpond.net.au, which doesn't look like a DNS server's
> name (CPE usually stands for Customer Premises Equipment, so I suspect it's
> a router at the customer end of a connection).

Telstra's DNS gives no ADDITIONAL response. This behaviour only seems to 
have appeared recently (around Tuesday 22 July).

Thanks,

Roger



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