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Chapter 6. Installing And Conﬁguring Your SME Server V5 with ServiceLink Software

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.

6.9.3. Option 3: Server-only mode

Server-only mode is appropriate if you do not wish to use the gateway capabilities of your server. In this conﬁguration, your server connects only to

the local network and does not connect directly to the outside world (although it may connect indirectly through your ﬁrewall or another server).

Warning

Because the server "trusts" the local network to be secure in server-only mode, it must be behind a ﬁrewall of some type. Under no

conditions should it be directly connected to the Internet.

Your network will resemble the image below:

If you have a connection to the Internet by way of another gateway or corporate ﬁrewall, you can conﬁgure your server to provide services

(including e-mail, web services, ﬁle and print-sharing) to your network. In this instance, you do not need your server to provide the gateway role

because that role is fulﬁlled by your ﬁrewall. If you select Option 3, "Server-only mode - protected network ", your server will provide your local

network with web, e-mail, ﬁle and print-sharing.

On the next conﬁguration screen, you should enter the IP address for the Internet gateway on your local network. If you do not have an Internet

connection, simply leave this conﬁguration screen blank.

6.10. Conﬁguring Server and Gateway Mode

If you are conﬁguring your server to operate in server and gateway mode, you must select one of two Internet connection types - a dedicated

connection (such as ADSL or cable modem) or a dialup connection (in which case you will be connecting to your ISP via a modem).

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Mitel SME Server V5 with ServiceLink Guía de usuario Pagina 28