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Old 11-03-2009, 05:41 PM   #1
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Reverse DNS on Bind9

Hi guys,

Having another one of those days - got a reverse DNS that's driving me nuts. It's probably pure pebkac, but any help appreciated.

Named.conf has the following entry:

zone "" {
type master;
file "/etc/bind/db.18.000.000";

Contents of db.18.000.000:

; BIND reverse data file for Student Mail
$TTL 604800

@ IN SOA (
1 ; Serial
10800 ; Refresh
3600 ; Retry
604800 ; Expire
604800 ) ; Negative Cache TTL

178 IN PTR

Bind takes it, but won't issue a reverse DNS lookup. No errors in logs.

any hints as to what I'm doing wrong? Can't concentrate in the slightest atm, the monkeys are agitated behind me >.<


Ok, resolved that I have a bizarre "REFUSED" error when attempting an NSlookup.

Dig -x works fine

Have checked IPtables, and UDP 53 is open on the firewall

Last edited by Taleya; 11-03-2009 at 07:10 PM. Reason: Fixed :D
Old 11-04-2009, 11:39 AM   #2
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In arpa zones where you have:


I don't have the @ for the name servers so it would only be:


P.S. You might want to set your serial number to something like 2009110401 instead of just 1. It doesn't matter really so long as you increment each time you update it (e.g. 2009110402 or just 2) but it does let you and others know when you last updated this zone.

Last edited by MensaWater; 11-04-2009 at 11:40 AM.


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