Chained notifies

Mark_Andrews at Mark_Andrews at
Mon Oct 14 05:45:03 UTC 2002

> Mark.Andrews at wrote:
> > > In my configuration I have a bind 8 server (server A) established in a
> > > dmz. I have a bind 8 server operating as a master in the open Internet
> > > (server B). And I have a third bind 8 server behind a firewall in
> > > rfc1918 address space (server C). I have a tunnel between server A and
> > > server C, both of which function as slaves.
> > >
> > > A zone in Server B is modified. Server B sends a notify to Server A.
> > > Server A, using tsig, performs a transfer from Server B. Having
> > > completed the transfer, I need server A to send a notify for the changed
> > > zone to Server C.
> >         If C is a listed nameserver then it should just work provided
> >         you have up to date versions.  Otherwise use notify-also on A.
> Thanks for the response. However...
> The issue as I see it is that if Server B sends a notify to Server A and
> Server C, at approximately the same instant, and the zone is larger
> than, lets say, a packet or two, then when Server A looks at Server C,
> the serial will not yet have changed, because the zone is just starting
> to transfer.

	Server C will ignore the message from B as B is not its master.

> How do I get Server C to notify server A, after it has the
> new complete zone, even though it is a secondary as well?

	You have A and C reversed in this sentence.  Named will do this
	already provide you have a up to date version.

> Thanks again.
> /rlj
Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at

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