Reverse Problem - ReadList.com

7 msg	show all RECORDS
4 msg	bind server fails to deliver

Reverse Problem
\ Chris Wittenberg (26 Feb 2005)
. \ Barry Margolin (26 Feb 2005)

6 msg	MS DNS - Internal WWW Resolving to External IP
2 msg	Nonexistent zone respond on query
4 msg	details of bug reports
1 msg	squid + caching name server
5 msg	Reverse DNS Delegation howto?
7 msg	DSL/DNS Confusion
8 msg	Why wont this MX record work properly?
1 msg	Memory leak in bind 9.3.0 with DNSSEC
3 msg	I: Problem w startup (disperatly)
8 msg	stops answering at same time every day
3 msg	Problem w startup (disperatly)
4 msg	cannot get reverse dns to work for 65.58.240.197
2 msg	question: setup
2 msg	PLZ ANYBODY KNOWS WHY ICAP PROTOCOL IS USED?
16 msg	Fail-over
1 msg	GUI to add A & PTR records to solaris bind9?
1 msg	Bind Configuration - Is it correct?

Subject:	Reverse Problem
Group:	Bind9-users
From:	Chris Wittenberg
Date:	26 Feb 2005

Hello,

I'm running bind 9.2.1 on a solaris box.

We noticed some inconsistencies with email between us and usc.edu -
causing some email to bounce with an error "you don't have permission
to send email".

Further checking revealed that of our ip ranges (we have 4 class C's),
one of them will not do a reverse lookup unless you are doing the
lookup directly from our server: 206.117.187.1. According to my logs,
there are no problems loading the zone (207.151.131), and all lookups
work perfectly - but only if the lookup is done using our server.

If you do a "host" or "nslookup" from another server, I get:
Host 8.131.151.207.in-addr.arpa not found: 3(NXDOMAIN)

All other networks perform the reverse lookup properly (i.e.,
206.117.187, 206.117.219), and all forward resolution works properly.

I am royally stumped as to why just one range wouldn't be working. Can
anyone shed some light on what I should check on?

Thanks very much for any help! If you need more info, just let me know.

-Chris