Date: Mon, 16 Apr 2001 21:28:55 -0400 (EDT) From: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> To: Kris Kennaway <kris@obsecurity.org> Cc: freebsd-security@FreeBSD.ORG, net@FreeBSD.ORG Subject: Re: non-random IP IDs Message-ID: <200104170128.VAA02080@khavrinen.lcs.mit.edu> In-Reply-To: <20010416125053.A11446@xor.obsecurity.org> References: <20010416121019.D10023@xor.obsecurity.org> <Pine.LNX.4.20.0104161919390.26335-100000@www.everquick.net> <20010416154249.A49858@mx.databus.com> <20010416125053.A11446@xor.obsecurity.org>
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<<On Mon, 16 Apr 2001 12:50:53 -0700, Kris Kennaway <kris@obsecurity.org> said: > Surely that can't work since the purpose of that field is for received > packet ordering No. The IP ID is effectively a nonce with respect to the receiving system. The only requirement is that IDs not be repeated while any packet with the same (source, dest) pair is still in the network. This is in practice impossible, so as with TCP we can simply pretend that all packets disappear after 60 seconds. Having said that, on the whole I think this whole idea is utterly pointless. -GAWollman To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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