Using Policy Routing to stop DoS attacks

Tue Mar 25 15:33:43 UTC 2003

>If you fooled the router into thinking that the reverse path for the
>source is on another another interface and then used strict unicast RPF
>checking, that may accomplish what you want without using ACLs.  I don't
>know what impact it would have on your CPU however, you'll have to
>investigate or provide more details.

However you'd also risk loosing any traffic that was asymmetric in nature.

-Jim