OWA on SBS 2003 only working via local LAN

[bertb 0]

i have a fresh install of SBS 2003 standard with all the latest patches etc.. I tried accessing OWA but it only works when access from inside the network. My server has 2 network cards, one connected to the internet and one connected to the local network, 192.168.0.x , i did notice that inside of IIS mgr , there is an ip restriction setup that only allows access from 192.168.0.X and 127.0.0.1, i'm trying to figure out why this is, and what the proper way to correct this so external users can access OWA.

 

thanks