Some time ago, someone else asked this question before...
Back then the answer was no... UPNP is a possible security issue, when 
misused by one of your local applications... and when using monowall, 
you know what you are doing, in so - you'd have to open ports yourself - 
which I greatly appreciate.

At the office, we disable every (commercial) router/firewall their UPNP 
option, that gets installed by customers... we simply don't like 
automatic opening of ports...

If you really want upnp, you should consider pfsense (although I don't 
use it, I see the option in my status list - which obviously tells me 
that it is disabled - I guess there is somewhere in the GUI an option to 
enable it in pfSense).

Rene Moser wrote:
> hi
>
> I would like to have UPnP in m0n0wall. Are there already any efforts 
> for  this feature? In my opinion, this should not be a big deal.
>
> /rene
>