ZyXEL Communications 662H Series, 662HW Series Chapter, Chapter, Chapter, Introduction to IPSec

	Prestige 662H/HW Series User’s Guide
Chapter 17
Anti-Virus Packet Scan........................................................................................		204
17.1	Overview ........................................................................................................	204
17.1.1 Types of Computer Viruses ..................................................................		204
17.2	Signature-Based Virus Scan ..........................................................................	204
17.2.1 Computer Virus Infection and Prevention .............................................		205
17.3	Introduction to the Prestige Anti-virus Packet Scan .......................................	205
17.3.1 How the Prestige Virus Scan Works ....................................................		206
17.3.2 Limitations of the Prestige Packet Scan ...............................................		206
17.4	Anti-virus Packet Scan Configuration .............................................................	207
17.5	Registration and Online Update .....................................................................	208
17.5.1 Updating the Anti Virus Packet Scan ....................................................		210
Chapter 18
Introduction to IPSec ...........................................................................................		212
18.1	VPN Overview ................................................................................................	212
18.1.1 IPSec ....................................................................................................		212
18.1.2 Security Association .............................................................................		212
18.1.3 Other Terminology ................................................................................		212
	18.1.3.1 Encryption ...................................................................................	212
	18.1.3.2 Data Confidentiality .....................................................................	213
	18.1.3.3 Data Integrity ...............................................................................	213
	18.1.3.4 Data Origin Authentication ..........................................................	213
18.1.4 VPN Applications ..................................................................................		213
18.2	IPSec Architecture .........................................................................................	213
18.2.1 IPSec Algorithms ..................................................................................		214
18.2.2 Key Management ..................................................................................		214
18.3	Encapsulation .................................................................................................	214
18.3.1 Transport Mode ....................................................................................		215
18.3.2 Tunnel Mode ........................................................................................		215
18.4	IPSec and NAT ...............................................................................................	215
Chapter 19
VPN Screens.........................................................................................................		218
19.1	VPN/IPSec Overview .....................................................................................	218
19.2	IPSec Algorithms ............................................................................................	218
19.2.1 AH (Authentication Header) Protocol ...................................................		218
19.2.2 ESP (Encapsulating Security Payload) Protocol .................................		218
19.3	My IP Address ................................................................................................	219
19.4	Secure Gateway Address ..............................................................................	220
19.4.1 Dynamic Secure Gateway Address ......................................................		220
19.5 VPN Summary Screen ...................................................................................		220
19.6	Keep Alive ......................................................................................................	222