Gateway Setup Assistant Overview

Mac OS X Server can be used as a virtual private network (VPN) server or a DHCP server, and it can provide Network Address Translation (NAT). While each of these services can be set up separately, Gateway Setup Assistant permits the basic and quick setup of each of these services.

Gateway Setup Assistant is useful when a novice user wishes to quickly provide Internet access through a Mac OS X Server.

To run Gateway Setup Assistant

1.	On your server, open the Gateway Setup Assistant tool by choosing /Applications/_Server/Gateway.
2.	Enter your address information, authenticate, and click Connect (Figure 2.83). Figure 2.83. After launching Internet Gateway Assistant, you must authenticate to your server. The Introduction pane appears (Figure 2.84). Figure 2.84. The Introduction dialog briefly explains what the Internet Gateway Assistant does.
3.	Click past the Introduction pane, choose the interface that connects to the Internet (WAN or Wide Area Network) and click Continue (Figure 2.85). Figure 2.85. Choose the wide area network (WAN) interface that connects to the Internet.
4.	Choose the LAN (Local Area Network) interface that will provide addresses to an internal network and click Continue (Figure 2.86). Figure 2.86. Choose the local area network (LAN) interface that connects to the internal network.
5.	Choose whether or not to enable virtual private networking (VPN) via Layer Two Tunneling Protocol over IP Security (L2TP over IPSec); if so, decide on the shared secret to be used and click Continue (Figure 2.87). Figure 2.87. Decide if you want to use virtual private networking (VPN) services. Keep in mind that the shared secretwhen typedappears in clear text.
6.	Scroll through your "Confirm setup" pane and click Save As to save the configuration for backup purposes (Figure 2.88). Figure 2.88. Review your settings and save them to a text file before applying them.
7.	Click Apply to setup basic Network Address Translation and possible VPN services.

Tip

• While Gateway Setup Assistant is easy to use, it does not permit a more granular set of options. If you use Gateway Setup Assistant, please familiarize yourself with both NAT and VPN at the very least.

Xgrid Admin Overview

Xgrid is software that permits several Mac OS X computers to use their idle processing power to complete tasks deployed by an Xgrid administrator. Xgrid Admin works in conjunction with the Xgrid service (set up with Server Admin) and Xgrid Agents (Mac OS X 10.4 computers) (Figure 2.89).

Figure 2.89. The Xgrid Admin tool is used to manage Xgrid clients and jobs.