Kinda funny you state that Roland. I know of at least two very large carriers that uses Netscreens (and soon SRX's) for their DoS/DDoS mitigation. State table exhaustion on the netscreen platform is something that is very easy to protect against with some protections and hasn't been a problem for years. If you can fill up a session table on a higher end SRX then I would be very very impressed. I would argue that firewalls place is in fact directly infront of servers and load balancers to protect them. On Mon, Jan 4, 2010 at 8:04 PM, Dobbins, Roland <rdobbins@arbor.net> wrote:
On Jan 5, 2010, at 4:25 AM, Jeffrey Lyon wrote:
Use a robust firewall such as a Netscreen in front of your mitigation tool.
Absolutely not - the firewall will fall over due to state-table exhaustion before the mitigation system will. Firewalls (which have no place in front of servers in the first place), load-balancers, and any other stateful devices should be southbound of the mitigation system.
----------------------------------------------------------------------- Roland Dobbins <rdobbins@arbor.net> // <http://www.arbornetworks.com>
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