[H-GEN] DNS Question for the DNS Gurus

[Anthony Irwin]

Rick Phillips wrote:

> I have a web/mailserver running with a number of virtual domains.  I am
> about to change my ISP after a number of years and will be "churning"
> the account.  This means that sometime on the nominated day, a Telstra
> technician makes a change in the exchange.  The new ISP can only
> guarantee that it will be done some time on the day nominated.
> 
> As I cannot afford to be off the air for too long and because
> re-delegation can take up to 24 hours, does anyone know if I can have my
> backup DNS server (on another machine and on another ISP) be changed to
> point to my new address while my own DNS server points to my current
> address.
> 
> The theory is that when the changeover happens, the new IP address will
> be available to the world immediately off the backup server.  My own DNS
> server can be changed after the event to match.  Would this work?
> 

You can get a free dns from sitelutions.com

You would need to point your domain to use the backup dns before you 
changed isp that way it will be able to use that dns when you go 
offline (you could do that by making it the secondary nameserver on 
the domain). When you know your new ip you would update the backup dns 
to point to the new ip.

Then you can change your local dns to use the new ip and then point 
your domains secondary nameserver back to you local dns unless you 
wish to keep it as a backup dns.

If you have email then you will also need to think about your mx 
records for your mail.


Kind Regards,
Anthony Irwin