If I were you I would set up a proxy on that server as well, after doing
that its easy to force your clients  to use the proxy. That way you can use
your firewall to redirect all traffic to the router of your choice. Easier
to manage and setup this way.

Hope it helped
On 20-Feb-2011 12:08 PM, "zongo saiba" <[email protected]> wrote:
> Hi Guys,
>
>
>
> Just new to Linux and most of all to Linux Server.
>
> I have wiped out my server and installed Ubuntu Server 10.10 (today's
> build).
>
> My goal is to use the firewall ufw for the entire network. One small
problem
> is that I have no access to the external router/modem.
>
> Is it possible for me to configure ufw to handle all connections in/out
> without causing an interaction with the main external router on the lan ?
>
> I have gone as far as adding rules and ipforwarding on ipv4 and ipv6. That
> works great on the server but not on my clients which continue to have a
> direct access to the network.
>
>
>
> Kind Regards,
>
> ZS
>
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