ZyXEL Communications ZyAir G-2000 PlusV2 User Manual page 14

ZyXEL G-2000 Plus v2 User's Guide
8.6 Trigger Port Forwarding ...................................................................................125
8.7 Configuring Trigger Port Forwarding ...............................................................126
Chapter 9
Static Route Screens ........................................................................................... 129
9.1 Static Route Overview ......................................................................................129
9.2 Configuring IP Static Route
Chapter 10
Firewalls................................................................................................................ 133
10.1 Firewall Overview ...........................................................................................133
10.2 Types of Firewalls ..........................................................................................133
10.3 Introduction to ZyXEL's Firewall .....................................................................134
10.4 Denial of Service ............................................................................................135
10.5 Stateful Inspection ..........................................................................................140
10.6 Guidelines For Enhancing Security With Your Firewall ..................................143
10.7 Packet Filtering Vs Firewall ............................................................................143
Chapter 11
Firewall Screens................................................................................................... 145
11.1 Access Methods .............................................................................................145
11.2 Firewall Policies Overview ..............................................................................145
11.3 Rule Logic Overview ......................................................................................146
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8.5.1 Configuring Address Mapping ...............................................................123
8.6.1 Trigger Port Forwarding Example ...........................................................126
8.6.2 Two Points To Remember About Trigger Ports .......................................126
9.2.1 Configuring Route Entry .........................................................................131
10.2.1 Packet Filtering Firewalls ......................................................................133
10.2.2 Application-level Firewalls ....................................................................133
10.2.3 Stateful Inspection Firewalls .................................................................134
10.4.1 Basics ...................................................................................................135
10.4.2 Types of DoS Attacks ...........................................................................136
10.4.2.1 ICMP Vulnerability ......................................................................139
10.4.2.2 Traceroute ...................................................................................139
10.5.1 Stateful Inspection Process ..................................................................140
10.5.2 Stateful Inspection and the ZyXEL device ............................................141
10.5.3 TCP Security .........................................................................................142
10.5.4 UDP/ICMP Security ..............................................................................142
10.5.5 Upper Layer Protocols ..........................................................................142
10.7.1 Packet Filtering: ....................................................................................143
10.7.1.1 When To Use Filtering .................................................................144
10.7.2 Firewall .................................................................................................144
10.7.2.1 When To Use The Firewall ..........................................................144
...........................................................................129
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