Apple Workgroup Server 8550 - Manual (Page 112)

Solving TCP/IP problems
Your server can’t connect to devices outside its local network.
Make sure your router address is correct.
Your server can connect to hosts by IP address, but not by name.
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Make sure you have entered valid domain names in the Additional
Search Domains box.
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If you have entered your local and administrative domain names,
double-check to make sure they’re correct.
Your server does not respond to a “ping.”
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Make sure you have an active application on your server that uses
TCP/IP and can respond to a ping from another computer.
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Make sure your TCP/IP configuration is correct.
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Make sure your network cables are properly connected.
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Make sure your network is functioning properly.
You can’t remember your Administration password.
You can erase your Administration password (along with all of your
TCP/IP settings and configurations) by dragging the TCP/IP Preferences
file (inside the Preferences folder in your active System Folder) to the Trash.
When you open the TCP/IP control panel again, you must reenter all your
settings.
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