I had this exact same problem using a similar Zyxel ADSL modem in bridge mode
with PPPoE and m0n0wall. My solution was related to some experiments I have
been doing with IDS which required me to connect a hub between m0n0wall and the
Zyxel and use a spare network connection on another system to monitor the PPPoE
traffic. Note that while this is not an ideal setup for IDS compared to an
ethernet tap, I was able to verify its correct operation for relatively low
speed links. This setup had the side effect of allowing me to directly access
my Zyxel on its IP address directly from the system running the IDS software.
I did a search through my list archive and found a reference from almost a year
ago to a more elegant solution to your problem on the wiki:
On Thu, 14 Sep 2006 18:11:33 +0100, you wrote:
>I've got here a device which I want to use as a plain ADSL to Ethernet bridge
>and have m0n0wall doing PPPoE. I can do this, all works well. The device is a
>ZyXEL P660R-60C I think.
>The problem with this setup is that I can no longer access the ZyXELs telnet
>or web interfaces. I'd like to be able to create a subinterface or assign a
>static IP to the WAN interface as well as use PPPoE on it.
>I do this with a Cisco 2600 series router and it works well.
>Is this possible with m0n0?