From owner-freebsd-net@FreeBSD.ORG  Sat Jan 13 14:56:26 2007
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Date: Sat, 13 Jan 2007 12:11:39 +0900
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From: gnn@freebsd.org
To: "Bruce M. Simpson" <bms@freebsd.org>
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Cc: freebsd-net@freebsd.org, Tadaaki Nagao <nagao@iij.ad.jp>, andre@freebsd.org,
	LI Xin <delphij@delphij.net>
Subject: Re: Different behavior of ping'ing INADDR_BROADCAST?
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At Thu, 11 Jan 2007 08:37:51 +0000,
Bruce M. Simpson wrote:
> I'm personally not in favour of sending a single broadcast packet to
> multiple interfaces as it has potential for denial of service, and
> doesn't seem to be consistent with the behaviour of other systems,
> or the most common use-case for undirected broadcast, which is early
> boot and/or DHCP.  Applications such as ISC DHCP work around the
> traditional BSD behaviour by using BPF to inject and receive IP
> broadcasts.
> 

Just on this quick point, I too think copying broadcasts to all
interfaces is a bad idea and should be avoided.

Best,
George