ZyXEL Communications ZyWall 10 User Manual page 10

ZyWALL 10~100 Series Internet Security Gateway
Chapter 11 Firewalls .............................................................................................................................. 11-1
11.1 Firewall Overview ................................................................................................................11-1
11.2 Types of Firewalls.................................................................................................................11-1
11.3 Introduction to ZyXEL's Firewall ........................................................................................11-2
11.4 Denial of Service...................................................................................................................11-3
11.5 Stateful Inspection ................................................................................................................11-7
11.6 Guidelines For Enhancing Security With Your Firewall ....................................................11-11
11.7 Packet Filtering Vs Firewall ...............................................................................................11-12
Chapter 12 Firewall Screens..................................................................................................................12-1
12.1 Access Methods ....................................................................................................................12-1
12.2 Firewall Policies Overview...................................................................................................12-1
12.3 Rule Logic Overview............................................................................................................12-2
12.4 Connection Direction Examples ...........................................................................................12-4
12.5 Configuring Firewall.............................................................................................................12-5
12.6 Example Firewall Rule .......................................................................................................12-12
12.7 Predefined Services.............................................................................................................12-17
12.8 Alerts...................................................................................................................................12-19
12.9 Configuring Attack Alert ....................................................................................................12-20
Chapter 13 Content Filtering Screens ..................................................................................................13-1
13.1 Content Filtering Overview ..................................................................................................13-1
13.2 Configuring Categories.........................................................................................................13-1
13.3 Configuring Free...................................................................................................................13-5
13.4 Configuring iCard .................................................................................................................13-7
13.5 Configuring List Update .......................................................................................................13-8
13.6 Configuring Exempt Computers ...........................................................................................13-9
13.7 Configuring Customize .......................................................................................................13-11
13.8 Configuring Keyword Blocking..........................................................................................13-14
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