[CentOS] Proper configuration for DNS slaves and masters

Craig White craigwhite at azapple.com
Tue Nov 3 18:59:42 UTC 2009

On Tue, 2009-11-03 at 13:34 -0500, James B. Byrne wrote:

> zone "byrnejb.ca" {
> 	type slave;
> 	masters {
> 		};
> 	file "/var/named/slaves/byrnejb.ca.hosts";
> 	};
> Which is, as far as I can see, identical.
> In any case, the real problem is that neither slave actually
> transfers the updated zone file and I cannot figure out why not.  I
> have verified that the master zone file serial number is greater
> than that of the slave zones.
> So, I have two questions:
> 1. Why is the source address when the bind named
> listens on and answers queries from the same address.
> Admittedly, is a virtual ip hosted on
> but  we have been doing this for over a decade now and I have never
> seen this behaviour before.
> 2. Why are the notifies ignored?  Again, we have had this set up for
> over a decade and none of these problems until now, and the only
> thing that has happened on the dns side of things recently were the
> CentOS updates last week.
> I am not a DNS specialist, I set this up several years ago and I am
> perplexed as to why it is now giving me these difficulties.  Any
> help would be gratefully appreciated.
why not add the other ip address just in case on the slaves...

masters {;;

you might also want to specifically add them to allow update...

acl HLLmasters {;;

allow-update {


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