Apps :: rc.firewall with monkey web server

I'd like to know how to make rc.firewall allow monkey web server to work, so that I could use the server and still feel secure about everything else.

I can access the default monkey web server page from another computer, but when I turn the firewall on with the default configs it stops working. Apparently I should open up a port (ports?) in the firewall but I have no idea how (I have never before needed to manually configure a firewall).

Any help would be appreciated!

original here.