[Users] two NIC cards in an OpenSER

Hi, I have an OpenSER/SEMS installation that has worked well for our SIP testing and internal PBX. Previously, the OpenSER/SEMS was on a single Ethernet interface behind our firewall, and the box was dedicated to OpenSER/SEMS while our other apps ran on a separate box, also behind our firewall. Now I am putting together an installation that will have everything on one server, and that server will have two Ethernet interfaces, one local and behind the firewall, and the second will be a public IP address. How can I configure OpenSER/SEMS to use one interface or the other, without it (and me) being confused? Thanks, Scott Yagel PacketCall, Inc. syagel(a)packetcall.net