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Re: bridge? tunnel?



Shawn,

I did essentially what you want using iptables and DNAT. There are security
issues witth protocols that require helper apps though.

Hope it helps,

John P Foster

Shawn Yarbrough wrote:

> Networking theory question:
>
> I have a Debian computer acting as a DSL router.  My ISP gave me 5
> static IP addresses but I'm currently using only one, for the router
> itself.
>
> The rest of my network is masqueraded very successfully.
>
> But what I want to do now is "promote" one or another of the masqed
> computers onto the "real" static subnet given to me by my ISP.  Some of
> these computers may be running Linux, others Windoze.
>
> I think I understand that a bridge does this kind of thing for entire,
> adjacent physical networks.  But I want to continue to masq some of the
> computers on my network, while routing other computers the traffic from
> my ISP-level subnet.  So the result is that I want two logical
> IP networks running over my physical network, one private, masqed, and
> unroutable, and the other public, static, and fully acting as part of
> the internet and my ISP-level subnet.
>
> Can bridging do this?  Or would IP tunnelling help me accomplish this?
> Or is there a better way?  And how can I easily do this in Debian?
>
> Thanks,
>
> Shawn Yarbrough
> shawn@nailstorm.com
>
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