Thanks Jeff and Robert,

 Robert's plan seems to be the best way to do the thing so I'll follow
that plan ;)

Thanks again,
Thomas.

On Fri, Feb 27, 2009 at 17:39, Jeff Lightner <jlight...@water.com> wrote:
> In your case it sounds like you're going to have two external IPs.  If so I'd 
> leave the Apache server with BIND running and add the new server as first one 
> at the registrar.  That way anyone that has your old server cached will 
> continue to get to it.  Any new queries hopefully would cache your new server.
>
> After you're sure the new server is up and running for a few days you can 
> stop BIND on the old one (to reduce load on it).
>
> -----Original Message-----
> From: Thomas Manson [mailto:dev.mansontho...@gmail.com]
> Sent: Friday, February 27, 2009 10:06 AM
> To: Jeff Lightner
> Cc: bind-users@lists.isc.org
> Subject: Re: Change my primary DNS server safely...
>
> Hi Jeff,
>
>  Actually, I've Postfix/Apache2/Bind (primary DNS) on the same
> machine which is hosted by one company.
>
>  I want to dedicate a server to be the primary DNS. This server is
> hosted by another company. (the first server will be re installed soon
> but will stay in the original hosting company).
>
>  The secondary DNS is already a dedicated server.
>
>  So my new primary DNS  is ready and the old server will still be
> running (at least for the apache2 service).
>  Should I let BIND running on the old server or stop it ?  (whould it
> be annoying if the old ip still answer to query ?)
>
> Regards,
> Thomas.
>
>
>
> On Fri, Feb 27, 2009 at 14:50, Jeff Lightner <jlight...@water.com> wrote:
>> Not sure where the trepidation comes in here.  Hopefully you ARE running
>> a slave server as well so if the primary isn't reachable the slave would
>> resolve lookups until you fixed any problem.
>>
>> Here we've moved our servers from one network provider to another so had
>> to change the IPs of the master and the slave at the Network registrars.
>> We did those one at a time.  That is to say we first did the slave and
>> once we were sure it was resolving correctly and had allowed time for
>> everyone's caches to clear (we waited 3 days/72 hours) then we moved the
>> master.
>>
>> We've also completely replaced both our primary and slave by installing
>> new servers and setting them with the IPs.  There again we did it by
>> doing one at a time.  For those there was no propagation time since the
>> IP stayed the same.
>>
>> If you're simply moving your master to a new IP (as the outside world
>> sees it) then you'll have to allow time for the caches to clear as we
>> did.  If you're simply moving it to a new IP internally then your
>> network folks should be able to NAT that IP to the same external IP your
>> prior server had.
>>
>> -----Original Message-----
>> From: bind-users-boun...@lists.isc.org
>> [mailto:bind-users-boun...@lists.isc.org] On Behalf Of Thomas Manson
>> Sent: Thursday, February 26, 2009 8:04 PM
>> To: bind-users@lists.isc.org
>> Subject: Change my primary DNS server safely...
>>
>> Hello,
>>
>>  I need to change the primary DNS server which manage hundreds of
>> domains.
>>
>>  I've setup the new machine so that it has the correct named
>> configuration for each domains (script generated).
>>
>>  I plan to change the IP behind the ns0.mydomain.com so that it
>> points to the new machine.
>>
>>  As I feel it's a bit risky to do that, if you have any suggestion,
>> I'll be glad to hear it.
>>
>> Thanks,
>> Thomas.
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