querying TLD nameservers - limitations

blrmaani blrmaani at gmail.com
Mon Mar 25 00:31:16 UTC 2013


hmm.. I see delay in response to some of my queries.. wondering if its our network?

On Sunday, March 24, 2013 5:02:57 PM UTC-7, Liu Mingxing wrote:
> According to my experience, less restriction is imposed by TLD operator 
> because TLD servers have sufficient ability and it is not secure for their 
> service to limit, especially when too much limitations are added.
> 
>  
> 
> 
> 
> Liu Mingxing
> 
>  
> 
> 
> 
> 
> 
> From: blrmaani
> 
> Date: 2013-03-25 07:55
> 
> To: comp-protocols-dns-bind
> 
> Subject: querying TLD nameservers - 
> limitations
> 
> 
> 
> I am developing a monitoring script for internal use and this requires extensive querying of TLD nameservers (a .. m).tld servers.
> 
>  
> 
> Questions:
> 
> 1. Are there any rate limitations imposed by TLD servers i.e these servers allows only certain number of DNS queries per IP per second?
> 
>  
> 
> 2. Are there other limitations I should be aware of while developing my script?
> 
>  
> 
> Any experience among this group members in developing these kind of scripts using Net::DNS::Resolver perl module?
> 
>  
> 
> Thanks!
> 
> Blr
> 
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