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Chapter 6. Installing And Configuring Your SME Server V5 with ServiceLink Software
6.9.1. Option 1: Server and gateway mode
In server and gateway mode, your server provides services (such as e-mail, web services, file and print sharing) to your network and
also acts as a gateway between your internal network and the outside world. The fact that it serves as a "gateway" means it has
separate interfaces with each network, and provides security and routing.
If you configure your server to operate in server and gateway mode, your server will require either:
1. two ethernet adapters (one to communicate with the local network and the other to communicate with the external
network/Internet)
2. one ethernet adapter (for the local network) and a modem for a dialup connection
With server and gateway mode, there are a number of extra parameters that will need to be configured. These will be discussed in the
next section.
6.9.2. Option 2: Private server and gateway
This mode is a variation of option 1 and provides the same functionality with the following differences:
• Your web server is not visible to anyone outside of the local network.
• Your mail server is not accessible from outside of the local network.
• Additional firewall rules have been configured to drop packets for various services (such as ’ping’ requests).
All services are available on the internal network. The differences are entirely in how your server is seen by the external world.
You would select this mode only if you wish to use the server as a gateway, but do not wish to publish any services to the external
Internet.
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