[dns-operations] auth servers in different TLDs

[Frederico A C Neves]

On Tue, Apr 17, 2018 at 12:23:26PM +0800, Yonghua Peng wrote:
> I saw some domains who have auth name servers in different TLDs.
> such as,
> 
> ;; ANSWER SECTION:
> gmx.net.                84558   IN      NS      ns-gmx.ui-dns.de.
> gmx.net.                84558   IN      NS      ns-gmx.ui-dns.biz.
> gmx.net.                84558   IN      NS      ns-gmx.ui-dns.com.
> gmx.net.                84558   IN      NS      ns-gmx.ui-dns.org.
> 
> ;; ADDITIONAL SECTION:
> ns-gmx.ui-dns.biz.      163883  IN      A       217.160.81.199
> ns-gmx.ui-dns.com.      258650  IN      A       217.160.82.199
> ns-gmx.ui-dns.de.       163237  IN      A       217.160.80.199
> ns-gmx.ui-dns.org.      163744  IN      A       217.160.83.199
> 
> And this,
> 
> easydns.com.            600     IN      NS      dns4.easydns.info.
> easydns.com.            600     IN      NS      dns1.easydns.com.
> easydns.com.            600     IN      NS      dns2.easydns.net.
> easydns.com.            600     IN      NS      dns3.easydns.org.
> 
> Is this best practices for hosting a domain?

As others already said, don't know, but take this research in
account.

https://www.usenix.org/legacy/events/imc05/tech/full_papers/ramasubramanian/ramasubramanian_html/dns.html

Fred