nanog mailing list archives

Re: ACLs / Filter Lists - Best Practices


From: Andreas Plesner Jacobsen <apj () nerd dk>
Date: Fri, 30 Nov 2001 08:41:08 +0100


On Fri, Nov 30, 2001 at 01:39:24AM -0500, Tim Irwin wrote:

- <rant>RFC 1918 filtering is no silver bullet.  Yes, it should be done, but
all a malicious person needs in order to be able to launch an effective DDoS
attack is to source from unassigned address space or address space that is
known to be unused.</rant>

And that's why we all need to employ things like CEF reverse path
verification at our customer edge.

-- 
Andreas Plesner Jacobsen | There's a lot to be said for not saying a lot.


Current thread: