System information
37Chapter 2 Getting Ready for Mac OS X Server
You can manually congure port mapping on most Internet routers by using their
conguration software. Usually the conguration software consists of several
webpages. Using a web browser on any computer connected to your local network,
you go to the webpage with settings for port mapping or port forwarding. In some
cases, you can select standard services such as web or VPN and specify that each be
mapped to your server’s IP address. In other cases, you must enter port numbers for
services and enter your server’s IP address for each one.
For a list of services and the corresponding ports for which you might want to set up
port mapping or forwarding, see “Services and Ports” on page 175.
Protecting Your Network by Making Your Server a Gateway
If you don’t have an AirPort Base Station or other router, but your server has two
Ethernet ports, you can make the server a gateway to share an Internet connection
with other computers on your local network. The server’s Ethernet ports must be
congured as follows before you begin initial Mac OS X Server setup:
One Ethernet port must have a public IP address on the Internet (not a private IP Â
address like 10.0.0.1 or 192.168.1.1). This port is connected to your DSL modem, cable
modem, or other Internet source. Usually, you use the server’s rst built-in Ethernet
port for this.
Another Ethernet port must be connected to a functional network switch or hub in Â
your local private network. This Ethernet port must be uncongured, have a manual
IP address, or have a self-assigned IP address beginning with 169.254.