Nortel 4134 User Guide

Nortel

3

Contents

New in this release

Firewall and NAT

GRE and IPIP tunneling

Authentication, Authorization, and Accounting

Introduction

Firewall and NAT Fundamentals

Firewall Overview

Stateful inspection elements

Virtual firewall zones

Transit policies on trusted zones only

No transit policies on internet untrusted zone

Default firewall

Three-legged firewall

Firewall network protection features

Application and URL filtering

Policy-based controls

Logging and statistics

NAT failover for firewalls

Interoperability with CS 1000 and MCS 5100 call servers

Cone NAT for CS 1000

Nortel Secure Router 4134

Security — Configuration and Management

NN47263-600

01.02

Standard

10.0

3 August 2007

Copyright © 2007, Nortel Networks

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