On Wed, Aug 08, 2007, Jamie Bowden wrote:
Forgive my broken formatting, but LookOut, it's Microsoft! Is what we use, period.
I have a question related to what you posted below, and it's a pretty simple one:
How is answering a query on TCP/53 any MORE dangerous than answering it on UDP/53? Really. I'd like to know how one of these security nitwits justifies it. It's the SAME piece of software answering the query either way.
I'd hazard a guess and say something like "TCP state complexity > UDP state complexity" and that possibly leading to a potential DoS. But then, there's also stuff like stateful firewalls which can more aggressively timeout UDP flows (and not break DNS ones, since they're not exactly long-living!) but die under large TCP loads. And TCP takes CPU to setup/teardown, and requires client-side state. Adrian