Date: Sat, 13 Jan 2007 12:11:39 +0900 From: gnn@freebsd.org To: "Bruce M. Simpson" <bms@freebsd.org> 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? Message-ID: <m2ac0n7h90.wl%gnn@neville-neil.com> In-Reply-To: <45A5F75F.8080404@FreeBSD.org> References: <459D4D88.2030708@delphij.net> <459FEDBC.4070008@FreeBSD.org> <20070107115158.GA63854@codelabs.ru> <45A54119.20809@FreeBSD.org> <20070111063715.GL14822@codelabs.ru> <45A5F75F.8080404@FreeBSD.org>
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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
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