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Date:      Tue, 15 Dec 1998 08:32:06 -0500 (EST)
From:      Jamie Bowden <jamie@itribe.net>
To:        Richard Smith <richard@jezebel.demon.co.uk>
Cc:        Antti Kaipila <anttik@iki.fi>, hackers@FreeBSD.ORG
Subject:   Re: Source address
Message-ID:  <Pine.SGI.3.96.981215082749.18639i-100000@animaniacs.itribe.net>
In-Reply-To: <36763ED7.99324B8B@jezebel.demon.co.uk>

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On Tue, 15 Dec 1998, Richard Smith wrote:

> Antti Kaipila wrote:
> > 
> > I have a interesting problem here. I have FreeBSD accting as a router
> > between our LAN and Internet. I have a ET5025 card as interface eth0 and
> > Intel EtherExpress as interface fxp0.
> > 
> > eth0 has address 10.156.214.2 and remote ends address is 10.156.214.1.
> > fxp0 has address 195.74.8.138
> > 
> > So, now when I try to connect from this machine acting as router to
> > anywhere on the internet my source address get set to
> > 10.156.214.2. Which is not nice, because all routers are dropping my
> > packets thinking they should'nt be routed (that's the right thing to
> > do ofcourse).
> > 
> > Is there any way around this?
> 
> You need to run natd on your FBSD router, so that all packets 'appear'
> to 
> originate from *it* (195.74.8.138). See man natd.

Not quite.  His ISP is using 1918 networks between routers.

I do this as well.  With Cisco you can set the primary IP of the router,
and all traffic appears to come from that IP, no matter which interface it
goes through.  If there is a way to have FreeBSD always report the
connection as coming from it's usable IP, all that has to be done is to do
it, but I don't know if FreeBSD can do that.

Jamie Bowden

-- 
Systems Administrator, iTRiBE.net

If we've got to fight over grep, sign me up.  But boggle can go.
	-Ted Faber (on Hasbro's request for removal of /usr/games/boggle)


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