[Gllug] proxy-arp and a vpn

Tom Schutzer-Weissmann trmsw at yahoo.co.uk
Sat Jun 18 10:26:25 UTC 2005

On Sat, 2005-06-18 at 08:53 +0100, Chris Bell wrote:
> On Sat 18 Jun, Tom Schutzer-Weissmann wrote:
> > 
> > 
> > I have an old Compaq laptop with 2 wireless cards, close enough to an
> > ADSL router for a wireless connection. One wireless card talks to the
> > router, one to my Thinkpad. Both have the same ip address, and I use
> > proxy-arp to enable the Thinkpad, which has the address,
> > to reach ADSL router and the internet beyond (obviously, the ADSL router
> > is doing NAT)
> > 
>    I have a couple of ancient boxes running Debian with the bridge utils
> package. One has two, the other three, network cards, all in promiscuous
> mode, with IP tables filtering. The bridge utils package sets up an
> invisible bridge with no visible IP address for the bridged FORWARD traffic,
> while access to the box itself requires knowledge of the bridge IP address,
> and can be restricted to just one or two boxes to allow limited admin
> access.

Bridging with wireless cards isn't straightforward, the cards need to
get into master mode. There's a chance the HermesAP driver will work in
my case, I will give it a try when I'm feeling brave.


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