DNS Attacks

Christopher Morrow morrowc.lists at gmail.com
Wed Jan 18 09:41:30 CST 2012


On Wed, Jan 18, 2012 at 10:05 AM, Nick Hilliard <nick at foobar.org> wrote:
> On 18/01/2012 14:18, Leigh Porter wrote:
>> Yeah like I say, it wasn't my idea to put DNS behind firewalls. As long
>> as it is not *my* firewalls I really don't care what they do ;-)
>
> As you're posting here, it looks like it's become your problem. :-D
>
> Seriously, though, there is no value to maintaining state for DNS queries.
>  You would be much better off to put your firewall production interfaces on
> a routed port on a hardware router so that you can implement ASIC packet
> filtering.  This will operate at wire speed without dumping you into the
> colloquial poo every time someone decides to take out your critical
> infrastructure.

I get the feeling that leigh had implemented this against his own
advice for a client... that he's onboard with 'putting a firewall in
front of a dns server is dumb' meme...



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