Date: Fri, 24 Jul 2009 06:27:51 -0700 From: Julian Elischer <julian@elischer.org> To: vova@fbsd.ru Cc: freebsd-net@freebsd.org, Jamie Ostrowski <jamie.ostrowski@gmail.com>, "Lucian@lastdot.org" <lucian@lastdot.org> Subject: Re: How to change default source address? Message-ID: <4A69B6D7.3080501@elischer.org> In-Reply-To: <1248433706.1678.13.camel@localhost> References: <5a3c8f450907230757j21191a11n6cae4699ec8a76e1@mail.gmail.com> <29ae62fc0907232114r2afb9dc8y966a22db6d3236bc@mail.gmail.com> <4A693DE2.3050905@elischer.org> <1248433706.1678.13.camel@localhost>
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Vladimir Grebenschikov wrote: > Hi > > >> you could set up 2 routing tables and assign different apps to use >> different tables > > Is it possible to select routing table by ipfw setfib X ? > > someting like: > > ipfw add setfib 1 ip from a.b.c.d to any out xmit em0 > setfib 1 route add default 10.10.10.1 no that wouldn't work for 2 reasons. 1/ for local sockets, the routing decision is made already before it gets to the firewall 2/ for non-ocal packets (from another machine that you are routing) the packet needs to b etested on the recv (in) side of things but by then the sending machine has aready decided on a local address too. The only way to do this would be to do: setfib -1 my_aplication so that the sockets were created looking at fib 1 or: setfib -1 /bin/sh so that all children used fib 1 > > > PS: > you may need to compile kernel with > options ROUTETABLES=2 > > PPS: > why there is not sysctl way to specify number of routing tables ? >
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