Avaya Business Secure Router 252 Configuration - Basics Instrukcja Użytkownika Pobierz pdf (Strona 155)

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Chapter 10 Firewalls 155

Nortel Business Secure Router 252 Configuration — Basics

Introduction to the Business Secure Router firewall

The Business Secure Router firewall is a stateful inspection firewall is designed to

protect against Denial of Service attacks when activated (in SMT menu 21.2 or in

the WebGUI). The Business Secure Router allows a private Local Area Network

(LAN) to be securely connected to the Internet. The Business Secure Router can

be used to prevent theft, destruction, and modification of data, as well as log

events, which is important to the security of your network. The Business Secure

Router also has packet filtering capabilities.

The Business Secure Router is installed between the LAN and a broadband

modem connecting to the Internet, so that it can allow it to act as a secure gateway

for all data passing between the Internet and the LAN.

The Business Secure Router has one ADSL WAN port and four Ethernet LAN

ports, which are used to physically separate the network into two areas.

• The WAN (Wide Area Network) port attaches to the broadband modem (cable

or ADSL) connecting to the Internet.

• The LAN (Local Area Network) port attaches to a network of computers,

which needs security from the outside world. These computers have access to

Internet services such as e-mail, FTP, and the World Wide Web. However,

inbound access is not allowed unless the remote host is authorized to use a

specific service.

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