querying TLD nameservers - limitations

Doug Barton dougb at dougbarton.us
Mon Mar 25 18:02:56 UTC 2013

There is no need to post to both the mailing list and the news group. 
You can safely post only to the list, and it will be sent to the group 
for you.

Rather than us guessing what it is you're trying to accomplish, can you 
say a little more about it? I can think of some legitimate reasons why a 
monitoring system may need to query TLD name servers, but before we can 
answer your question properly we really need to know a bit more 


On 03/24/2013 04:55 PM, blrmaani wrote:
> 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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