At least one person on the list asked me
to share what I did - so here it is -
along with one "dumb DSL router trick"
that I just tried...
1. On the General Setup screen, I set webGUI protocol to https
2. On the Firewall Rules, I used + to add a rule:
TCP * * 188.8.131.52 443 (HTTPS) WAN-> me
(In the GUI, it's Pass...WAN...TCP...any...any - any...single host/31...https
(IP address above was changed for obvious reasons :-)
Dumb LAN/DSL tricks...
My pebble is my default router and is set to NAT all outbound traffic...
so I realized that I could go to the "public/routable" address of
the m0n0wall, and it would see me as coming from pebble,
even though the traffic went right past the sis1 interface.
I mention this because I didn't realize at first that I could do this
There are many NAT scenarios where this would not work, ymmv.