Moving DNS out of non-cooperative provider

John Miller johnmill at brandeis.edu
Mon Jun 18 17:19:22 UTC 2012


Hi Alexander,

We've actually run into this before.  Once upon a time, RCN cable used 
to run some slave servers for us, but we've long since moved away from 
them, including zone transfers.  We yanked them from our registrar a 
long time ago, and life was good.  For whatever reason, RCN's still 
answering queries for brandeis.edu.

As others have mentioned, change your DNS servers with your domain 
registrar, and you'll be fine.

John



On 06/18/2012 11:49 AM, Alexander Gurvitz wrote:
> Can someone enlighten me on the following scenario
> (I guess it's explained somewhere, but can't find the info.):
>
> example.com <http://example.com> was served by ns.OLDprovider.net
> <http://ns.OLDprovider.net>
> example.com <http://example.com> owner wants to move his domain to
> ns.NEWprovider.net <http://ns.NEWprovider.net>
> oldprovider.net <http://oldprovider.net> is not cooperating, and
> continues to serve
> example.com <http://example.com> 172800 NS ns.OLDprovider.net
> <http://ns.OLDprovider.net>
> (*.gtld-servers.net <http://gtld-servers.net> and ns.newprovider.com
> <http://ns.newprovider.com> now serve
> example.com <http://example.com> 172800 NS ns.NEWprovider.net
> <http://ns.NEWprovider.net>)
>
> Recursive resolver ns.isp.com <http://ns.isp.com> queried for
> www.example.com <http://www.example.com> every few minutes,
> and currently have
> example.com <http://example.com> 45892 NS ns.OLDprovider.net
> <http://ns.OLDprovider.net>
> in it's cache. www.example.com <http://www.example.com> have TTL of 3600.
> Thus each hour ns.isp.com <http://ns.isp.com> queries ns.OLDprovider.net
> <http://ns.OLDprovider.net>,
> with each query gets new NS record, and... refreshes the NS TTL ?
>
> Will ns.isp.com <http://ns.isp.com> EVER query ns.NEWprovider.net
> <http://ns.NEWprovider.net> ?
>
> I'd be happy to know how BIND behaves, but also
> how other servers may behave in this case.
>
> Regards,
> Alexander Gurvitz,
> net-me.net <http://net-me.net>



More information about the bind-users mailing list