Clarification about DNS notify

[Torsten]

Am Fri, 10 Sep 2010 12:51:11 +0530
schrieb Sherin George <list at sheringeorge.co.cc>:

> Hey Guys,
> 
> I have an issue which need some help.
> 
> I have two master DNS servers, say A & B.
> 
> A is running freebsd & B is running centos. B is running BIND 9 also.
> Now, I want to add one more to this cluster say C.
> 
> I have installed centos in C with BIND 9. Now, I have copied
> /etc/named.conf & /var/name from B to C. Now I restarted named in C.
> Everything worked.
> 
> Now, I have a question which may be quite simple, but I couldn't find
> an answer even after lot of googling. So, I would be extremely
> grateful for any advice you could offer.
> 
> When I restarted named in C, I could see that C is sending DNS
> notifications and B is receiving it
> 
> from /var/log/messages in C:
> 
> "Sep  9 23:53:44 serverC named[11844]: zone example.com/IN: sending
> notifies (serial 20050        30401)"
> 
> from /var/log/messages in B:
> 
> Sep 9  23:53:44 serverB named[30375]: client XX.XX.XX.XX#54546:
> received notify for zone 'example.com'
> 
> I checked  /etc/named.conf and I couldn't see any particular reason
> for C choosing to notify B.
> 
> Any explanation to this behavior or a link to any relevant guide will
> be helpful.
> 

Sharing your current configuration would help in helping you with your
problem. ;)

A wild guess would be that you're missing a "notify no" or "notify
master-only" option on your slave servers.


Ciao
Torsten

> --
> Regards,
> Sherin
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