[dns-operations] auth servers in different TLDs

[Evan McKinney]

NS records in different TLDs gives the zone the advantage of resiliancy against an attack taking an entire TLD down. 

⁣Sent from Blue ​

On Apr 17, 2018, 07:51, at 07:51, Mariano Absatz - gmail <el.baby at gmail.com> wrote:
>On 17 April 2018 at 01:23, Yonghua Peng <ypeng at gmx.net> 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?
>>
>
>Wouldn't know if "best" practice, but definitively NOT a bad practice.
>
>--
>Mariano Absatz - El Baby
>www.clueless.com.ar
>
>
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