DNS DoS ???

Mon Aug 1 02:27:19 UTC 2011

On Aug 1, 2011, at 9:22 AM, Mark Andrews wrote:

> And even if DNS/TCP was use by default machines can still get DoS'd because IP is spoofable.

They can be DDoSed with spoofed or non-spoofed packets, and there are defenses against such attacks.  

Apologies if I was unclear - my point was that huge, crushing, multi-gigabit-per-second DNS reflection/amplification attacks would no longer be possible with a TCP-only DNS, and that there would be other benefits, as well.  Large-scale testing of TCP-only DNS would be quite informative, IMHO.

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Roland Dobbins <rdobbins at arbor.net> // <http://www.arbornetworks.com>

		The basis of optimism is sheer terror.

			  -- Oscar Wilde