Home page logo
/

nanog logo nanog mailing list archives

Re: SMURF amplifier block list - READ THIS
From: "Jay R. Ashworth" <jra () scfn thpl lib fl us>
Date: Tue, 14 Apr 1998 19:18:17 -0400

On Tue, Apr 14, 1998 at 05:22:42PM -0500, Karl Denninger wrote:
Uh, folks, blocking the broadcast address will NOT help you in the case 
of a smurf POUNDING ON YOU.  It will ONLY prevent your customers launching 
a smurf against someone ELSE.  A FAR more effective means of doing THAT is 
to prohibit source address forgery on your connections.

Um, Karl?  That's not what we were talking about.

What we were talking about was forbidding external connections to the
class-C broadcast addresses on a net, and why that useful process made
addressing hosts on .255 boundaries A Bad Idea.

Cheers,
-- jra
-- 
Jay R. Ashworth                                                jra () baylink com
Member of the Technical Staff             Unsolicited Commercial Emailers Sued
The Suncoast Freenet      "Two words: Darth Doogie."  -- Jason Colby,
Tampa Bay, Florida             on alt.fan.heinlein             +1 813 790 7592

Managing Editor, Top Of The Key sports e-zine ------------ http://www.totk.com


  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]