[dns-operations] Strange reverse DNS entry

Duane Wessels wessels at packet-pushers.com
Tue Sep 25 23:00:26 UTC 2007



On Wed, 26 Sep 2007, Michael Monnerie said:

> Wow, thanks to all for your quick answers. And how could I resolve such
> an entry to an IP via dig? I've tried all formats I could think of, but
> can't find the right one.

With dig from here I get both:

$ dig +short 152.146.4.12.in-addr.arpa ptr
152.128/26.146.4.12.in-addr.arpa.
ns1.tmdfrictioninc.com.128/26.146.4.12.in-addr.arpa.

but it looks like someone forgot the trailing dot on the PTR
record.  It should just be 'ns1.tmdfrictioninc.com.'

If you don't get both answers from the initial query,
then you can always do a second query like this:

$ dig +short 152.128/26.146.4.12.in-addr.arpa. ptr
ns1.tmdfrictioninc.com.128/26.146.4.12.in-addr.arpa.

DW




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