ZyXEL Communications 2602H Series Chapter, Chapter, Content Filtering, Introduction to IPSec

	Prestige 2602H/HW Series User’s Guide
14.2	Firewall Policies Overview .............................................................................	181
14.3	Rule Logic Overview ......................................................................................	182
14.3.1 Rule Checklist .......................................................................................		182
14.3.2 Security Ramifications ..........................................................................		182
14.3.3 Key Fields For Configuring Rules .........................................................		183
	14.3.3.1 Action ..........................................................................................	183
	14.3.3.2 Service ........................................................................................	183
	14.3.3.3 Source Address ...........................................................................	183
	14.3.3.4 Destination Address ....................................................................	183
14.4	Connection Direction Example .......................................................................	183
14.4.1 LAN to WAN Rules ...............................................................................		184
14.4.2 WAN to LAN Rules ...............................................................................		184
14.4.3 Alerts .....................................................................................................		185
14.5	Configuring Basic Firewall Settings ................................................................	185
14.6	Rule Summary ...............................................................................................	186
14.6.1 Configuring Firewall Rules ....................................................................		188
14.7	Customized Services .....................................................................................	191
14.8	Creating/Editing A Customized Service .........................................................	191
14.9	Example Firewall Rule ...................................................................................	192
14.10 Predefined Services .....................................................................................		196
14.11 Anti-Probing ..................................................................................................		198
14.12 DoS Thresholds ...........................................................................................		199
14.12.1 Threshold Values ................................................................................		200
14.12.2 Half-Open Sessions ............................................................................		200
	14.12.2.1 TCP Maximum Incomplete and Blocking Time .........................	200
Chapter 15
Content Filtering ..................................................................................................		203
15.1	Content Filtering Overview .............................................................................	203
15.2	Configuring Keyword Blocking .......................................................................	203
15.3	Configuring the Schedule ..............................................................................	204
15.4	Configuring Trusted Computers .....................................................................	205
Chapter 16
Introduction to IPSec ...........................................................................................		207
16.1	VPN Overview ................................................................................................	207
16.1.1 IPSec ....................................................................................................		207
16.1.2 Security Association .............................................................................		207
16.1.3 Other Terminology ................................................................................		207
	16.1.3.1 Encryption ...................................................................................	207
	16.1.3.2 Data Confidentiality .....................................................................	208
	16.1.3.3 Data Integrity ...............................................................................	208
	16.1.3.4 Data Origin Authentication ..........................................................	208

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