Changing DNS servers (name only) for a DNSSEC enabled domain

[Mark Elkins]

If the IP addresses of the DNS servers (dns[123].olddomain and 
dns[123].newdomain) are staying the same - then you only need to send an 
update to change your domain from being hosted at olddomain to 
newdomain. Ideally, the newdomain would be created first (pointing to 
the same IP addresses as in olddomain) in the Registry, then after a day 
or two, have the olddomain in the Registry deleted - but it shouldn't 
really matter.

People who are looking for DNSSEC records will still go to the correct 
places - because the IP addresses at those places are not changing.

On 2023/02/13 17:58, Danilo Godec via bind-users wrote:
> Hello,
>
>
> in the near future I will have to change NS records for one of my 
> domains, as DNS servers currently use an old domain (not mine), that 
> will be phased out. DNS servers will actually remain the same, only 
> the domain name will change.
>
> So, basically:
>
>   * mydomain currently uses dns1.olddomain, dns2.olddomain,
>     dns3.olddomain, ...
>   * dns*.olddomain are the same servers as dns*.newdomain
>   * mydomain has to change DNS server to dns1.newdomain,
>     dns2.newdomain, dns3.newdomain, ...
>
>
>
> Since DNSSEC is enabled on mydomain, I've been reading some 
> instructions about doing this with DNSSEC and they say:
>
> 1. Disable DNSSEC at Registrar
> 2. Wait 24 hours
> 3. Disable DNSSEC at Name Server (remove DS-records)
> 4. Switch name servers
> 5. Wait 24 hours
> 6. Re-enable DNSSEC

I personally prefer,

Create the Domain on the new nameservers, sign it, send the new DS 
record to the Registry. This probably means loading the DS record via 
the old (existing) Registrar. Wait 24 hours (propagation time) then 
update (swap) the Nameservers at the Registry to the new Nameservers.
Wait a day or two then remove the domain from the old servers.
As long as one of the DS records matches the DNSKEY on either the old or 
new Nameservers - DNSSEC should validate.

The problem is - not many Registrars allow a foreign DS record to be 
loaded in their system for uploading to the Registry. I do allow the 
client to do this. Don't think it has ever happened though.


>
>
> Is this really necessary in this case, changing only DNS server names? 
> I would like to avoid changing DS records at the registrar level as 
> they don't provide a 'self-service' interface for managing them, so I 
> have to go though their support and that's usually tedious.
>
> If that is necessary, why?
>
>
>    Thanks, Danilo
>
> PS: If it matters, this is (still) a manually DNSSEC'd domain.
>
-- 

Mark James ELKINS  -  Posix Systems - (South) Africa
mje at posix.co.za       Tel: +27.826010496 <tel:+27826010496>
For fast, reliable, low cost Internet in ZA: https://ftth.posix.co.za 
<https://ftth.posix.co.za>

Posix SystemsVCARD for MJ Elkins

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