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Message-ID: <1FAB20E3-D230-451A-8396-0FAAC628C20E@arbor.net> Date: Thu, 12 May 2011 01:30:32 +0000 From: "Dobbins, Roland" <rdobbins@...or.net> To: "full-disclosure@...ts.grok.org.uk" <full-disclosure@...ts.grok.org.uk> Subject: Re: Sony: No firewall and no patches On May 12, 2011, at 3:49 AM, phocean wrote: > To go back to my point: an application server (IIS, Apache) cannot sustain as many connections as a firewall (of course in a sane and standard environment). Sorry, but my operational experience is quite the opposite. And one generally deploys clusters of servers, in any kind of even semi-important site. > So you cannot tell that a firewall will increase the risk of DoS. I can and do tell you that. I further tell you that enforcing network access policies for servers in stateless ACLs instantiated in ASIC-based routers and layer-3 switches is the way to go. I tell you this based upon my direct experience working for the largest manufacturer of firewalls in the world, and on my day-to-day operational experience with people calling up and screaming that 'the data center is down' and the proximate cause being a stateful firewall which gave up the ghost to trivial amounts of traffic. For example, I've seen 80kpps of SYN-flood take down a stateful firewall rated for 2.5gb/sec. > From what I have seen so far as arguments, I think the discussion is over. The folks cited on pp. 41 - 42 of the survey in question have reached a different conclusion: <http://www.eweek.com/index2.php?option=content&task=view&id=66503&pop=1&hide_ads=1&page=0&hide_js=1&catid=45> ----------------------------------------------------------------------- Roland Dobbins <rdobbins@...or.net> // <http://www.arbornetworks.com> The basis of optimism is sheer terror. -- Oscar Wilde _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
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