RE: DNS zone transfer

From: David Schwartz (davidsat_private)
Date: Sun Jun 09 2002 - 17:22:01 PDT

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On Sun, 9 Jun 2002 20:49:37 -0300, Maximiliano Perez wrote:

>We all know that tcp filtering is a very common practice.

	 A DNS server that is authoritative for a zone must not filter TCP. The 
relevant standards do not specify any preference for UDP over TCP. A client 
could legitimately issue all its DNS queries using TCP. Claiming that you 
will provide DNS service for a zone and then failing to provide that service 
due to filtering is the network equivalent of fraud.

	If you have any standards that contradict this, cite them.

	DS

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