[dns-operations] Maybe I'm just not with it...

[Joe Greco]

Can anybody imagine what the advantage of this is?

Non-authoritative answer:
1.1.20.123.in-addr.arpa name = localhost.

Authoritative answers can be found from:
20.123.in-addr.arpa     nameserver = vdc-hn01.vnn.vn.
20.123.in-addr.arpa     nameserver = hcm-server1.vnn.vn.

Appears to be that way for that /16 at least.  I can see a generic
response of some sort, but this almost seems like someone's trying
to exploit misconfigurations maliciously.

... JG
-- 
Joe Greco - sol.net Network Services - Milwaukee, WI - http://www.sol.net
"We call it the 'one bite at the apple' rule. Give me one chance [and] then I
won't contact you again." - Direct Marketing Ass'n position on e-mail spam(CNN)
With 24 million small businesses in the US alone, that's way too many apples.