ServiceLink Manual

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.