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
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