I have configured 2 different Macs with Panther Server (an iMac and a G5), both with a single Ethernet.
Both getting Internet IP from ISP via DHCP.
When I startup Panther Server my Internet IP must to be the first, and Local IP must to be the second. but ever I restart Panther Server my Internet IP is placed in second, and Local in first.
I must to remove manually Local IP from System Preferences, enter it again... and all works fine. Local IP appears as second again.