Re: Firewalling and network resource consumption while under attack

david (david@kalifornia.com)
Mon, 21 Sep 1998 10:40:42 -0700

Reply to mail from Alan Cox about Firewalling and network resource consumption while under attack
-----------------
> You cannot regulate inbound traffic. You regulate outbound traffic at the
> ISP end, and Linux 2.1.x can do exactly that, you can feed all syn frames
> down a different CBQ class (even with its own routing table 8))

if(stack>80% && SYN) drop_without_even_allocating_anything();

feasible?

I'm looking at discussing this in detail to come up with a solution so
that a linux box doesn't keel over totally blind even under heavy inbound SYN
attack. I'll do some studies of the network path and see if we can come
up with a novel solution that is viable for 2.3.

-d

-- 
Look, Windows 98  Buy, lemmings, buy!  MCSE, Must Consult Someone Experienced
(c) 1998 David Ford.  Redistribution via the Microsoft Network is prohibited.
 for linux-kernel: please read linux/Documentation/* before posting problems




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