ZyXEL Communications Prestige 653HWI series, User Manual

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Prestige 653HWI Series User’s Guide
viii Table of Contents
9.1 Dynamic DNS............................................................................................................................9-1
9.2 Configuring Dynamic DNS .......................................................................................................9-1
Chapter 10 Time Zone...............................................................................................................................10-1
10.1 Configuring Time Zone ...........................................................................................................10-1
Firewall and Content Filters ........................................................................................................................IV
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 Configuration ..........................................................................................................12-1
12.1 Remote Management and the Firewall ....................................................................................12-1
12.2 Enabling the Firewall...............................................................................................................12-1
12.3 Attack Alert..............................................................................................................................12-2
Chapter 13 Creating Custom Rules .........................................................................................................13-1
13.1 Rules Overview........................................................................................................................13-1
13.2 Rule Logic Overview...............................................................................................................13-1
13.3 Connection Direction ...............................................................................................................13-3
13.4 Logs .........................................................................................................................................13-5
13.5 Rule Summary .........................................................................................................................13-5
13.6 Predefined Services..................................................................................................................13-7
13.7 Creating/Editing Firewall Rules.............................................................................................13-10
13.8 Timeout..................................................................................................................................13-13
Chapter 14 Customized Services ..............................................................................................................14-1
14.1 Introduction to Customized Services .......................................................................................14-1
14.2 Creating/Editing A Customized Service ..................................................................................14-2
14.3 Example Custom Service Firewall Rule ..................................................................................14-3
Chapter 15 Content Filtering Screens......................................................................................................15-1
15.1 Content Filtering Overview .....................................................................................................15-1
15.2 Configuring Keyword Blocking...............................................................................................15-1
15.3 Configuring the Schedule ........................................................................................................15-3
15.4 Configuring Trusted Computers ..............................................................................................15-4
VPN/IPSec ...................................................................................................................................................... V
Chapter 16 Introduction to IPSec.............................................................................................................16-1
16.1 VPN Overview.........................................................................................................................16-1
16.2 IPSec Architecture ...................................................................................................................16-3
16.3 Encapsulation...........................................................................................................................16-4
16.4 IPSec and NAT ........................................................................................................................16-4