Date: Tue, 25 Nov 1997 21:01:41 +0000 From: "Edwin" <edwin@introweb.nl> To: dwhite@resnet.uoregon.edu Cc: freebsd-questions@freebsd.org Subject: Re: Complex NAT issue Message-ID: <199711252001.UAA29061@mustang.introweb.nl> In-Reply-To: <Pine.BSF.3.96.971125104632.17289M-100000@gdi.uoregon.edu> References: <347A0290.EB311071@introweb.nl>
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> Date: Tue, 25 Nov 1997 10:47:15 -0800 (PST)
> From: Doug White <dwhite@gdi.uoregon.edu>
> Reply-to: Doug White <dwhite@resnet.uoregon.edu>
> To: Edwin <edwin@introweb.nl>
> Cc: freebsd-questions@FreeBSD.ORG
> Subject: Re: Complex NAT issue
> On Mon, 24 Nov 1997, Edwin wrote:
>
> > I'm facing a complex connectivity problem.
> > What I've got is 3 different routers on 3 different networks.
> > What I want to get working is 1 network with windows (3.11 or 95)
> > machines connected to these 3 networks.
> > What I thought of is the following:
> > put 4 network cards into 1 PC with FreeBSD.
> > Put 1 network card on the local network and NAT on this NIC.
> > Then it should be working alright... or doesn't it ?
> > Somebody have any suggestions ?
>
> Sounds like a job for a real router with firewall capabilites.
Could be done with 3 routers with NAT I would think at first.
But which one of the 3 would be the gateway ?
>
> Can you provide some ASCII art to help illustratre your problem/desired
> solution?
I'll try.
3 different networks. Routers attached to leased line. With an
ethernet port to connect to.
This is the setup I had in mind:
Remember that the IP adresses of the 3 networks are fixed because of
the organisations providing the network services. There are
applications running on each of these networks. Therefore when I want
to be able to access all these applications on 1 computer I must be
able to connect to all of them (at the same time). And yes it is
TCP/IP that is used in all networks.
leased line leased line leased line
[x.x.x.x1/24] [y.y.y.y1/24] [z.z.z.z1/24]
| | |
[x.x.x.x2/24] [y.y.y.y2/24] [z.z.z.z2/24]
ep0 ep1 ep2
+------------------------------------------------+
| FreeBSD server with Firwall |
+------------------------------------------------+
ed0
[192.168.0.1]
|
+------------------------------------+
| local network |
+------------------------------------+
When I would put NAT on the ed0 interface. Shouldn't I be able to
communicate with the 3 different networks ?
The next trouble is that from these 3 networks I also want to connect
to a machine in the local network. Just to make things a bit more
complicated ;-).
Fixed translation from ip to ip would be the solution.
Anybody have any experience with this ?
I now I'm asking a lot. But it's a rather complicated situation I
think.
Met vriendelijke groeten,
Edwin Ringersma
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