how to check which dns client is used on an external server? : <p>The issue is that i cannot determine what domain name system external servers use.</p>

<p>I want to be able to spot which kind of domain name system client is a server using without having actually access to it.</p>

<p>I have tried several commands on n map with domain name system searching script, but the result is not clear. </p>

<p>For ports open i can use n map.</p>

<p>Is there a solution for domain name system spotting too ?</p>
