maybe a dumb idea on how to fix the dns problems i don't know....

Chris Paul chris.paul at rexconsulting.net
Sun Aug 10 17:10:16 CDT 2008


> The question isn't whether to offer TCP/53 up at the recursive
> server.  The issue is that for you to use TCP/53 from your recursive
> server, it has to be offered up at the authoritative end.  
>
> The authoritative server operators have to offer TCP/53 and the
> firewall administrators between the recursive server and the
> authoritative servers have to allow the traffic.
>
> 				 -rob
>   
Yes. This is true. But with a caching resolver being used for most 
interactive clients (web surfers), this doesn't cause any problem, other 
than the initial caching.

OK I guess the question is this: How many milliseconds now on average 
does it take for my local dns server to obtain an address which is 
uncached using recursion up to the authoritative end using UDP
And I guess the second question is: How many milliseconds on average 
would it take for my local dns server to obtain an address which is 
uncached using recursion up to the authoritative end using TCP.

Once it is cached on my local caching server, its a non-issue if I am 
using some sort of persistent connection to my (non-authoritative) dns 
caching server.

CP
-- 
Chris Paul
Rex Consulting, Inc
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