Re: Linux Router distro's with dual stack capability

[Chuck Anderson <cra () WPI EDU>]

On Thu, Feb 11, 2010 at 04:12:03PM -0600, William Pitcock wrote:
> On Thu, 2010-02-11 at 13:05 -0500, Jack Carrozzo wrote:
> > Lots of people roll FreeBSD with Quagga/pf/ipfw for dual stack. See
> > the freebsd-isp list.
>
> FreeBSD's network stack chokes up in DDoS attacks due to interrupt
> flooding.  We used to use FreeBSD for firewalling and basic routing, but
> when noticing that we had horizontal scalability (e.g. a Celeron 667mhz
> performed nearly as well as a dual dual-core Xeon system when DDoS
> attacks happened), we switched to Vyatta, and generally have not looked
> back.

Have you tried using FreeBSD's polling mode instead of interrupt mode?

No experience with it myself, but it sounds cool:

http://info.iet.unipi.it/~luigi/polling/