Security Services - Firewalling - Alcatel AST570 User Manual

17 Security Services - Firewalling

Introduction
In this chapter
3EC 17766 AAAA TCZZA Ed. 04
A Firewall is a security gateway that controls access between a
private (W)LAN domain, often referred to as Intranet, and the
public Internet.
It secures the entry points to the network, in such a way that access
is only allowed to authorized traffic. Therefore, to effectively
control the flow of data, firewall protection should be placed at
each point where the network connects to the WAN, or the
Internet.
This chapter aims to familiarize you with the operation of the
AST570' programmable Firewall.
Topic
Operation of the Firewall
Firewall Model
Firewall Actions
Firewall Criteria
Firewall and NAPT
Firewall Configuration
Firewall Configuration Examples
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See
17.1
17.2
17.3
17.4
17.5
17.6
17.7