[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 {
> 216.185.71.33;
> };
> 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 216.185.71.27 when the bind named
> listens on 216.185.71.33 and answers queries from the same address.
> Admittedly, 216.185.71.33 is a virtual ip hosted on 216.185.71.27
> 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 {
216.185.71.33;
216.185.71.27;
};
you might also want to specifically add them to allow update...
acl HLLmasters {
216.185.71.33;
216.185.71.27;
};
allow-update {
HLLmasters;
};
Craig
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