Migrating config from openwrt/tomato to asuswrt

Hello all,

I finally bought a RT56 (second hand) for Xmas and I'm setting it up (flashed firmware 378.56_2 to it). I'm migrating my old config from an old WRT54GL which ran tomato and/or openwrt. The configuration migration was done by hand, but there are two features that don't look the same in Asus' web interface...

First, I want to configure static port forwarding and I do this from WAN -> Virtual Server. But the web interface doesn't allow me to specify source...

Migrating config from openwrt/tomato to asuswrt