Problem solved.  After digging around the m0n0wall forum (its fun
having two places to look isn't it <g>), I did the following and got
it going:

In 1.3b8, I went to Firewall->NAT->Outbound NAT:

Source: 10.12.45.0/24  (my LAN subnet, with the voip box on it)
Portmap: Disable port mapping checked (default unchecked)
all other values defaulted to blank.
I added a description "Default NAT rule"
Save

Check the box "Enable advaned outbound NAT"

Save

And now my voip box was able to work as expected.

I hope this helps someone else!

cheers, michael


I created a single rule:

On Jan 15, 2008 10:13 AM, Mike Mee <mikemee at gmail dot com> wrote:
> Just to confirm, this morning I switched firmware to 1.3b8 and
> incoming audio on incoming calls stopped working. I switched back to
> 1.232 and everything started working again as expected.
>
> Fwiw, I checked firewall logs and didn't see anything related being blocked.
>
> Any ideas / suggestions on how to track this down?
>
> Someone suggested offlist (thanks!):
> > Try disabeling portmapping on the outbound NAT.
>
> I've seen that option on pfsense (and tried it to no avail) but when I
> poked around the m0n0wall 1.3b8 I couldn't see that setting.
>
> thx, michael
>