Moving DNS out of non-cooperative provider

Tom Diehl tdiehl at
Mon Jun 18 16:19:12 UTC 2012

On Mon, 18 Jun 2012, Alexander Gurvitz wrote:

> Can someone enlighten me on the following scenario
> (I guess it's explained somewhere, but can't find the info.):
> was served by
> owner wants to move his domain to
> is not cooperating, and continues to serve
> 172800 NS
> (* and now serve
> 172800 NS
> Recursive resolver queried for every few minutes,
> and currently have
> 45892 NS
> in it's cache. have TTL of 3600.
> Thus each hour queries,
> with each query gets new NS record, and... refreshes the NS TTL ?
> Will EVER query ?
> I'd be happy to know how BIND behaves, but also
> how other servers may behave in this case.

It is not a question of how bind behaves. It is a question of how does
dns work. Bottom line is, setup nameservers with $NEWPROVIDER and change
the nameserver records with your registrar and move on. All will be well
when the ttl's time out.

Until the ttl's timeout, resolvers with the old nameservers cached will still
query them. Once the ttl's time out the new servers will be queried.

Hope this helps,

Tom Diehl       tdiehl at      Spamtrap address mtd123 at
-------------- next part --------------
Please visit to unsubscribe from this list

bind-users mailing list
bind-users at

More information about the bind-users mailing list