Date: Tue, 25 Jul 2006 13:40:24 +0100 From: Brian Candler <B.Candler@pobox.com> To: Brett Glass <brett@lariat.net> Cc: freebsd-net@freebsd.org, Marko Zec <zec@icir.org> Subject: Re: Multiple NAT router Message-ID: <20060725124024.GA8695@uk.tiscali.com> In-Reply-To: <7.0.1.0.2.20060724204450.09bcbe80@lariat.net> References: <7.0.1.0.2.20060721105813.0971ae90@lariat.net> <20060724090909.GB3412@uk.tiscali.com> <200607241609.30783.zec@icir.org> <7.0.1.0.2.20060724204450.09bcbe80@lariat.net>
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On Mon, Jul 24, 2006 at 09:17:37PM -0600, Brett Glass wrote: > I've been noodling over this for two weeks now, and am thinking > that the easiest thing to do might be is map every address in each > "virtual" router to a unique address from FreeBSD's point of view > (i.e. 192.168.0.2 on LAN 1 becomes 10.0.0.2, while 192.168.0.2 on > LAN 1 becomes 10.0.1.2, etc.). The translation would be done by > "hooks" as close as possible to the interfaces, so FreeBSD's stack > wouldn't know it was being done. > > All that would be needed in that case would be to do "dumb" address > translation at the interfaces -- transparently to FreeBSD -- just > before the packets entered and left. One problem is managing the allocation of the translated addresses. But why not do dumb mapping of IPv4 addresses to IPv6 ? That would let you have up to 2^96 "virtual routers", and finally provide a reason for the IPv6 code to exist :-)
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