How to verify Concentric.net has delegated reverse lookups to my NS?

Barry Margolin barmar at bbnplanet.com
Thu Nov 11 18:41:50 UTC 1999


In article <80deni$lqe at journal.concentric.net>,
David Cunningham <newsonly at please.com> wrote:
>This should be an easy one.  Anyone know a good command to determine if
>concentric.net has delegated reverse lookups for 209.220.157.208/240 to my
>nameserver "ns1.radiusweb.com"?
>
>Also, did I specify the above mask correctly?  My address range at radiusweb
>is 209.220.157.208-224.  (I'm new at this.)

No, it's 209.220.157.208/28.  The number after the slash is the number of
1-bits in the network mask.  Also, your range ends at .223, not .224.

It looks like the created the delegation; you can see it with:

dig -x 209.220.157.208/28 ns @nameserver.concentric.net

However, they haven't created the CNAME records for
208.157.220.209.in-addr.arpa through 223.157.220.209.in-addr.arpa.  If you do:

dig -x 209.220.157.209 any @nameserver.concentric.net

you won't see the CNAME record that should be there.

-- 
Barry Margolin, barmar at bbnplanet.com
GTE Internetworking, Powered by BBN, Burlington, MA
*** DON'T SEND TECHNICAL QUESTIONS DIRECTLY TO ME, post them to newsgroups.
Please DON'T copy followups to me -- I'll assume it wasn't posted to the group.


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