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Numbering nameservers and resolvers

Subject: Numbering nameservers and resolvers
From: dougb at dougbarton.us (Doug Barton)
Date: Tue, 17 Aug 2010 11:11:51 -0700
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]>

On 08/17/2010 05:11, Sven Olaf Kamphuis wrote:
> tcp/zonetransfer not working reliably is no longer a problem

TCP is a MUST for DNS.

It's used as a fallback in the normal resolution process if an answer 
can't fit in a UDP packet for whatever reason. This is true even for 
common things like large A record lists, but is only becoming more 
frequent in the age of DNSSEC, AAAA, etc. It is unfortunately even more 
necessary than we had hoped it would be due to many local network 
operators not "getting the memo" regarding EDNS.


hth,

Doug

-- 

	Improve the effectiveness of your Internet presence with
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	Computers are useless. They can only give you answers.
			-- Pablo Picasso

References:
- Numbering nameservers and resolvers
  - From: mike-nanog at tiedyenetworks.com (Mike)
- Numbering nameservers and resolvers
  - From: patrick at ianai.net (Patrick W. Gilmore)
- Numbering nameservers and resolvers
  - From: cmadams at hiwaay.net (Chris Adams)
- Numbering nameservers and resolvers
  - From: owen at delong.com (Owen DeLong)
- Numbering nameservers and resolvers
  - From: mpalmer at hezmatt.org (Matthew Palmer)
- Numbering nameservers and resolvers
  - From: sven at cb3rob.net (Sven Olaf Kamphuis)

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