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P-2802H(W)(L)-I Series User’s Guide
185
C
H A P T E R
14
VPN Screens
This chapter introduces the VPN screens. See
for information on
viewing logs and the appendix for IPSec log descriptions.
14.1 VPN/IPSec Overview
Use the screens documented in this chapter to configure rules for VPN connections and
manage VPN connections.
14.2 IPSec Algorithms
The
ESP
and
AH
protocols are necessary to create a Security Association (SA), the
foundation of an IPSec VPN. An SA is built from the authentication provided by the
AH
and
ESP
protocols. The primary function of key management is to establish and maintain the SA
between systems. Once the SA is established, the transport of data may commence.
14.2.1 AH (Authentication Header) Protocol
AH
protocol (RFC 2402) was designed for integrity, authentication, sequence integrity (replay
resistance), and non-repudiation but not for confidentiality, for which the
ESP
was designed.
In applications where confidentiality is not required or not sanctioned by government
encryption restrictions, an
AH
can be employed to ensure integrity. This type of
implementation does not protect the information from dissemination but will allow for
verification of the integrity of the information and authentication of the originator.
14.2.2 ESP (Encapsulating Security Payload) Protocol
The
ESP
protocol (RFC 2406) provides encryption as well as the services offered by
AH
.
ESP
authenticating properties are limited compared to the
AH
due to the non-inclusion of the IP
header information during the authentication process. However,
ESP
is sufficient if only the
upper layer protocols need to be authenticated.
An added feature of the
ESP
is payload padding, which further protects communications by
concealing the size of the packet being transmitted.
Содержание P-2802H-I Series
Страница 1: ...www zyxel com P 2802H W L I Series VDSL VoIP IAD User s Guide Version 3 70 6 2007 Edition 1...
Страница 2: ......
Страница 7: ...Safety Warnings P 2802H W L I Series User s Guide 7...
Страница 8: ...Safety Warnings P 2802H W L I Series User s Guide 8...
Страница 10: ...Contents Overview P 2802H W L I Series User s Guide 10...
Страница 32: ...List of Tables P 2802H W L I Series User s Guide 32...
Страница 33: ...33 PART I Introduction Introducing the ZyXEL Device 35 Introducing the Web Configurator 43...
Страница 34: ...34...
Страница 50: ...Chapter 2 Introducing the Web Configurator P 2802H W L I Series User s Guide 50...
Страница 51: ...51 PART II Wizard Internet and Wireless Setup Wizard 53 VoIP Wizard And Example 65...
Страница 52: ...52...
Страница 64: ...Chapter 3 Internet and Wireless Setup Wizard P 2802H W L I Series User s Guide 64...
Страница 70: ...Chapter 4 VoIP Wizard And Example P 2802H W L I Series User s Guide 70...
Страница 72: ...72...
Страница 82: ...Chapter 5 Status Screens P 2802H W L I Series User s Guide 82...
Страница 88: ...Chapter 6 WAN Setup P 2802H W L I Series User s Guide 88...
Страница 116: ...Chapter 8 Wireless LAN P 2802H W L I Series User s Guide 116...
Страница 154: ...Chapter 10 Voice P 2802H W L I Series User s Guide 154...
Страница 174: ...Chapter 11 Firewalls P 2802H W L I Series User s Guide 174...
Страница 178: ...Chapter 12 Content Filtering P 2802H W L I Series User s Guide 178...
Страница 184: ...Chapter 13 Introduction to IPSec P 2802H W L I Series User s Guide 184...
Страница 219: ...Chapter 15 Certificates P 2802H W L I Series User s Guide 219 Figure 122 My Certificate Details...
Страница 238: ...Chapter 16 Static Route P 2802H W L I Series User s Guide 238...
Страница 250: ...Chapter 17 Quality of Service QoS P 2802H W L I Series User s Guide 250...
Страница 254: ...Chapter 18 Dynamic DNS Setup P 2802H W L I Series User s Guide 254...
Страница 282: ...Chapter 20 Universal Plug and Play UPnP P 2802H W L I Series User s Guide 282...
Страница 284: ...284...
Страница 324: ...Chapter 25 Troubleshooting P 2802H W L I Series User s Guide 324...
Страница 334: ...Chapter 26 Product Specifications P 2802H W L I Series User s Guide 334...
Страница 336: ...336...
Страница 348: ...Appendix A Setting up Your Computer s IP Address P 2802H W L I Series User s Guide 348...
Страница 404: ...Appendix G Legal Information P 2802H W L I Series User s Guide 404...
Страница 410: ...Appendix H Customer Support P 2802H W L I Series User s Guide 410...
Страница 418: ...Index P 2802H W L I Series User s Guide 418...