P-662H/HW-D Series User’s Guide
Chapter 16 VPN Screens
239
C
H A P T E R
16
VPN Screens
This chapter introduces the VPN screens. See the Logs chapter for information on viewing
logs and the appendix for IPSec log descriptions.
16.1 VPN/IPSec Overview
Use the screens documented in this chapter to configure rules for VPN connections and
manage VPN connections.
16.2 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.
16.2.1 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.
16.2.2 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 802.11g ADSL 2+ 4-Port Security Gateway HW-D Series
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Страница 32: ...P 662H HW D Series User s Guide 32 List of Figures ...
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Страница 64: ...P 662H HW D Series User s Guide 64 Chapter 2 Introducing the Web Configurator ...
Страница 84: ...P 662H HW D Series User s Guide 84 Chapter 4 Bandwidth Management Wizard ...
Страница 108: ...P 662H HW D Series User s Guide 108 Chapter 5 WAN Setup ...
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Страница 155: ...P 662H HW D Series User s Guide Chapter 8 DMZ 155 Figure 81 DMZ Private and Public Address Example ...
Страница 156: ...P 662H HW D Series User s Guide 156 Chapter 8 DMZ ...
Страница 188: ...P 662H HW D Series User s Guide 188 Chapter 11 Firewall Configuration Figure 97 Firewall Edit Rule ...
Страница 202: ...P 662H HW D Series User s Guide 202 Chapter 11 Firewall Configuration ...
Страница 210: ...P 662H HW D Series User s Guide 210 Chapter 12 Anti Virus Packet Scan ...
Страница 214: ...P 662H HW D Series User s Guide 214 Chapter 13 Content Filtering ...
Страница 232: ...P 662H HW D Series User s Guide 232 Chapter 14 Content Access Control ...
Страница 238: ...P 662H HW D Series User s Guide 238 Chapter 15 Introduction to IPSec ...
Страница 273: ...P 662H HW D Series User s Guide Chapter 17 Certificates 273 Figure 144 My Certificate Details ...
Страница 284: ...P 662H HW D Series User s Guide 284 Chapter 17 Certificates Figure 152 Trusted Remote Host Details ...
Страница 292: ...P 662H HW D Series User s Guide 292 Chapter 18 Static Route ...
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Страница 332: ...P 662H HW D Series User s Guide 332 Chapter 22 Universal Plug and Play UPnP ...
Страница 338: ...P 662H HW D Series User s Guide 338 Chapter 23 System ...
Страница 344: ...P 662H HW D Series User s Guide 344 Chapter 24 Logs ...
Страница 350: ...P 662H HW D Series User s Guide 350 Chapter 25 Tools ...
Страница 363: ...P 662H HW D Series User s Guide Chapter 27 Troubleshooting 363 Figure 213 Security Setting ActiveX Controls ...
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Страница 368: ...P 662H HW D Series User s Guide 368 Product Specifications ...
Страница 372: ...P 662H HW D Series User s Guide 372 Appendix C Wall mounting Instructions ...
Страница 408: ...P 662H HW D Series User s Guide 408 Appendix F Wireless LANs ...
Страница 420: ...P 662H HW D Series User s Guide 420 Appendix H Command Interpreter ...
Страница 436: ...P 662H HW D Series User s Guide 436 Appendix L NetBIOS Filter Commands ...
Страница 462: ...P 662H HW D Series User s Guide 462 Appendix M Internal SPTGEN ...
Страница 484: ...P 662H HW D Series User s Guide 484 Appendix P Triangle Route ...