Toshiba Magnia SG30 - Manual (Page 115)

120 Establishing an Internet Connection
Internet security and the firewall
5.375 x 8.375 ver 2.1
Internet security and the firewall
The Magnia SG30 serves as a gateway between your local
network (LAN) and the Internet. Whether through a
broadband connection using the built-in Ethernet port, or
through the built-in modem or ISDN connection for dial-up
Internet access, all your local network’s traffic for the Internet
is channeled through the server’s gateway. This provides
much more efficient access to the Internet.
The Magnia SG30 incorporates a firewall into the Internet
gateway feature to prevent unauthorized access to your
network.
DEFINITION: Firewall is the term for a security measure
implemented in both hardware and software that prohibits
unauthorized users on the Internet from gaining access to the
resources on your network.
This firewall is designed to protect your local network while
allowing efficient access to the Internet for your users. It
prohibits access to your local computer network, and protects
your proprietary data and files.
How the firewall works
The primary purpose of a firewall is to provide a single point
of entry where a defense can be implemented, allowing
access to the Internet from within the organization while
controlling access from the Internet to the Magnia SG30.
The firewall works by refusing nearly all direct access to your
Magnia SG30 from the Internet. No one may access any
application, file, or resource within your firewall from the
Internet, but any application (from the local network) may
access the Internet and conduct bidirectional access
transparently.