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You'll need to configure your Router to forward connection
requests that come from the Internet to your Mac server. When you do that,
we will identity the Mac with the server by its Local/private IP Address on
the LAN. Before you do that, you want to make sure that IP Address of the Mac
isn't going to change.
You can see your Mac's currently assigned private/local
IP Address in the Network Preference pane:
Because this system is connected to a router, the system's
assigned IP Address, Subnet Mask, and Router address are visible in the
display. Make a note of these.
When we assign a static IP address, we want to assign
one that meets two important criteria:
- It's unique on the sub-network. (Two computers can't be assigned
the same IP address on the subnetwork. They will both come hopelessly confused,
as will the Router and any other computer talking to them.) This means you
want to pick a value that the Router's DHCP will never assign to another computer.
- It's appropriate to the subnet. I.e. it "fits in" with
the other IP addresses being used. This can be a complicated to explain, but
for most purposes it's almost certainly safe if we say it has the same
first 3 numbers as other computers on the subnet.
To make sure your Mac's IP Address stays the same, change
your Network Preferences configuration, on the TCP/IP tab, by changing
the Configure pull-down menu to say Manually. Then you need to enter the
IP Address, Subnet Mask, and Router Address for your network. The Subnet Mask and
Router address you fill in should stay the same as they values that were dynamically
assigned when you were using DHCP (see above.) Also fill in your ISP's Domain Name
Server (DNS) information (It should be part of the setup information they gave
you. If you don't have that for some reason, you can often just use the Router's
IP Address - e.g. 192.168.1.1 for the LinkSys; the router should have obtained
the DNS info via DHCP or PPPoE from your ISP.)
In this example, I chose 192.168.1.20 for my Server's
IP Address. That address works well with a LinkSys router: It's on the same
sub-network as the LinkSys (192.168.1.--). I haven't used it for any other
computer I have. And, the LinkSys DHCP server assigns IP's.
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