I have setup the 3rd interface as DMZ with a routed subnet. This works 
fine. The DMZ can be reached from the internet and from the LAN. But 
still I am unable to ping from the WebGUI to any machine in the DMZ. The 
error is "No route to host". This is not a major issue, but also 
syslog'ing to a box in the DMZ will not work, as m0n0wall can not find a 
route to the machine.

Adding routes to the "Static Routes" did not help at all.

Any idea what I am doing wrong?

Thanks

Rémy Günter