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One of the things that users of cable modems have to deal with is that the service installation people require that they install service ONLY on a non-networked computer.   When the installer leaves, you have a speedy network connection, but you've lost the connection to your other machines!

If you just want one computer connected to the Internet via the cable modem and still want your computer networked to your other Macs, you can follow the process found below. 


This process was sent to me by a friendly site visitor who wanted to share his findings, but wishes to remain anonymous.  I've looked it over and think it should work, but with one warning.  I recommend you make sure you're using Open Transport 1.3 or higher if you're not running MacOs 8.5 or higher.  The reason for this is that from what I've been able to gather from Apple's TIL, it looks like that OT1.3 was the first version to support multiple TCP/IP connections.  The process follows below.  

Please note that I won't answer questions about this procedure.


A Two Mac Network with a MediaOne Cable Modem.

-or-

How to connect a PowerBook to a desktop Mac via 10baseT ethernet when the desktop has a cable modem installed.

-or-

If the MediaOne guys blew away your Macintosh LAN here's how to get it back.


This worked for a PowerBook G3 and a desktop 8500, both running System 8.5.

After setup it allows both MediaOne internet usage from the desktop Mac and file transfers between both Macs WITHOUT additional software or changing of Control Panel settings.


1)  Install an Ethernet 10baseT adapter PCI card and software. (If you use the Asante Fast 10/100 PCI 10/100 mbps PCI Adapter, you must download current driver software from www.asante.com for it to work with System 8).

2) Connect the PowerBook and the desktop to a 5 port 10baseT Ethernet mini-Hub. Connect both Macs to any of the five "out" ports, and use the port on the new ethernet card for the desktop. (note: haven't tested a hubless network with a direct "crossover"cable, but it should probably work just as well.)

3) Leave the MediaOne cable modem attached to the built-in ethernet port on the desktop. The cable modem must be attached directly to the Ethernet port and will not work off a hub as part of a local network (which is why an additional card is necessary).

The following steps apply to BOTH Macs:

4) In AppleTalk control panels:

a) Make AppleTalk active

b) Set the Powerbook to Connect via: "Ethernet"

c) Set the Desktop to connect via: "Ethernet slot B1" or where the card was installed, (not "built-in")

5) In Users and Groups control panels:

a) double-click your name (owner)

b) Under "Show Identity"set your name and password, you will need the password to connect, it's easiest to use the same user name and password on both Macs.

c) Switch to "Show Sharing", check both "Allow user to connect to this computer" and "Allow user to see all disks"

6) In File Sharing control panels:

a) Be sure you have your owner name, owner password, and computer name set.

b) If file sharing is off, click "start"

7) In TCP/IP control panels:

a) Under the "Edit" pull-down menu select "User Mode...".

b) Click "Advanced" then "OK"

c) In the control panel window select connect via: "Ethernet" on the PowerBook and connect via: "Ethernet slot B1" on the desktop.

d) Select Configure: "Manually"

e) Click the "Info" button and copy down the "This Macintosh" 12 digit IP address on each machine (include periods), then click "OK"

f) Type this number into the "IP address" area (if it is not already there)

g) Type 255.255.0.0 in the "Subnet mask" area (if it is not already there)

8) In the Chooser (apple menus)

a) Click the "AppleShare" icon.

b) AppleTalk should still be active

c) Click "Server IP Address..."

d) In the "Enter the Server Address:" area type the 12 digit IP address of the OTHER mac (include the three periods). You only need to enter these numbers the first time you connect.

e) Click connect. Enter your username and password.

f) The hard drive(s) of the other Mac should appear as an icon on the desktop.

g) MediaOne internet should still be working on the desktop Mac.

9) After this network set-up it's easy to connect:

a) Go to the Chooser

b) Click the "AppleShare" icon

c) Double click the other Mac's name

d) Choose the hard drive(s)

e) Enter the password

10) To disconnect, hold down the control key and click on the hard drive icon. Choose "put away" from the menu. (Or just drag the icon to the trash as you would eject a floppy.

Notes: - Unlike SCSI connections you can connect or disconnect a network connection while the machines are on (but not while the drives are being shared).

- If you use a printer connected to your printer port you will also need the free Control Panel "LaserWriter Bridge" v2.1 from Apple Computer. 

There is info and download at:
http://wwwnet.princeton.edu/mac/lwb/lwb-caveats.html .

This Control Panel will let you use the printer connected to one Mac only without needing any additional network hardware.

Setup Mac TCP/IP



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