nanog mailing list archives
Re: D/DoS mitigation hardware/software needed.
From: Tim Eberhard <xmin0s () gmail com>
Date: Mon, 4 Jan 2010 20:17:49 -0600
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> Injustice is relatively easy to bear; what stings is justice. -- H.L. Mencken
Current thread:
- D/DoS mitigation hardware/software needed. Rick Ernst (Jan 04)
- Re: D/DoS mitigation hardware/software needed. Jeffrey Lyon (Jan 04)
- Re: D/DoS mitigation hardware/software needed. Dobbins, Roland (Jan 04)
- Re: D/DoS mitigation hardware/software needed. Tim Eberhard (Jan 04)
- Re: D/DoS mitigation hardware/software needed. Dobbins, Roland (Jan 04)
- Re: D/DoS mitigation hardware/software needed. Adrian Chadd (Jan 04)
- Re: D/DoS mitigation hardware/software needed. Steve Bertrand (Jan 05)
- Re: D/DoS mitigation hardware/software needed. Dobbins, Roland (Jan 04)
- Re: D/DoS mitigation hardware/software needed. Ćukasz Bromirski (Jan 09)
- RE: D/DoS mitigation hardware/software needed. Stefan Fouant (Jan 09)
- Re: D/DoS mitigation hardware/software needed. Dobbins, Roland (Jan 09)
- RE: D/DoS mitigation hardware/software needed. Stefan Fouant (Jan 09)
- Re: D/DoS mitigation hardware/software needed. Jeffrey Lyon (Jan 09)
- Re: D/DoS mitigation hardware/software needed. Dobbins, Roland (Jan 09)
- Re: D/DoS mitigation hardware/software needed. Jeffrey Lyon (Jan 04)
- Re: D/DoS mitigation hardware/software needed. jim deleskie (Jan 04)