There are many different ways to set up the networking. The simplest case is when the host is attached to an ethernet network using static IP numbers. In this case, it is easiest to use the sheep_net driver:

With this configuration it is necessary that MacOS and linux are configured to use different IP-numbers on the same subnet. Ask your system administrator for a free IP-number. The configuration might look something like:

It should be possible to ping MacOS from Linux. If it doesn't work, something is wrong. Open the TCP/IP control panel and check the settings. After the "real" MacOS has been booted, it might be necessary to open the control panel and select "Ethernet" because MacOS sees a difference between MOL-ethernet and built-in ethernet.

AppleTalk should work out-of-the-box using when the sheep_net ethernet driver is used. (Make sure "ethernet" is selected in the AppleTalk control panel).