Simple SuSEFirewall2 question

Hi All, Here's what I believe to be a simple question. By using Yast to configure the firewall, (the sysconfig module) where would I put in my information regarding the external interface for only allowing 2 ip addresses (from the internet) to connect to the server using SSH? Also, what would the syntax be? This is a new install of 8.1 Pro. I remember on the version 7.x series, I could just enter the (ip,protocol,port) on the FW_External interface option. This doesn't seem to work anymore, although it may be a mistake on my end. Thanks a lot! Kevin