well, we had a lot of posts regarding that matter.
As far as I remember this was solved, so there has to  be some answer
in the archives.

anyways, as far as I remember the solution was not to use the WAN
port as WAN but just another. You will still need 3 nics to do that.

But this is just fading memory. Search the archives.
It was definitely solved

--K

Referring to Dennis Severt :
> Hi
>
> 2 Weeks from now i asked this:
>
> how can you let m0n0wall only do the bridging work, I only need the firwall and
> bandwidth managing services. when I put the wan and the lan interface in the same
> subnet, the wan interface goes down...
>
> Well i get 1 answer for this:
>
> Subnets and IP addresses are Layer3. Bridging is Layer2.
>
> Configure your ports for bridging instead. Search the mono
>
> list archive for similar posts and you'll find directions
>
> on how to do it.
>
> ---------------------
>
>
>
> But i don't get it :(
>
> Can anybody be more specific?
>