Prestige 662HW Series User’s Guide
Chapter 19 VPN Screens
218
C
H A P T E R
1 9
VPN Screens
This chapter introduces the VPN screens. See the Logs chapter for information on viewing
logs and the appendix for IPSec log descriptions.
19.1 VPN/IPSec Overview
Use the screens documented in this chapter to configure rules for VPN connections and
manage VPN connections.
19.2 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.
19.2.1 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.
19.2.2 ESP (Encapsulating Security Payload) Protocol
The
ESP
protocol (RFC 2406) provides encryption as well as some of 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.
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Страница 59: ...Prestige 662HW Series User s Guide 59 Chapter 2 Introducing the Web Configurator...
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Страница 263: ...Prestige 662HW Series User s Guide 263 Chapter 21 Universal Plug and Play UPnP...
Страница 269: ...Prestige 662HW Series User s Guide 269 Chapter 22 Logs Screens...
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Страница 301: ...Prestige 662HW Series User s Guide 301 Chapter 25 Introducing the SMT...
Страница 305: ...Prestige 662HW Series User s Guide 305 Chapter 26 Menu 1 General Setup...
Страница 319: ...Prestige 662HW Series User s Guide 319 Chapter 29 Wireless LAN Setup...
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Страница 339: ...Prestige 662HW Series User s Guide 339 Chapter 32 Static Route Setup...
Страница 343: ...Prestige 662HW Series User s Guide 343 Chapter 33 Bridging Setup...
Страница 375: ...Prestige 662HW Series User s Guide 375 Chapter 36 Filter Configuration...
Страница 395: ...Prestige 662HW Series User s Guide 395 Chapter 39 System Information and Diagnosis...
Страница 411: ...Prestige 662HW Series User s Guide 411 Chapter 40 Firmware and Configuration File Maintenance...
Страница 417: ...Prestige 662HW Series User s Guide 417 Chapter 41 System Maintenance...
Страница 421: ...Prestige 662HW Series User s Guide 421 Chapter 42 Remote Management...
Страница 433: ...Prestige 662HW Series User s Guide 433 Chapter 44 Call Scheduling...
Страница 449: ...Prestige 662HW Series User s Guide 449 Chapter 46 SA Monitor...
Страница 453: ...Prestige 662HW Series User s Guide 453 Chapter 47 Internal SPTGEN...
Страница 459: ...Prestige 662HW Series User s Guide 459 Appendix A Pin Assignments Figure 290 Ethernet Cable Pin Assignments...
Страница 479: ...Prestige 662HW Series User s Guide 479 Appendix C IP Subnetting...
Страница 485: ...Prestige 662HW Series User s Guide 485 Appendix E Wireless LAN and IEEE 802 11...
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Страница 493: ...Prestige 662HW Series User s Guide 493 Appendix H Triangle Route...
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Страница 527: ...Prestige 662HW Series User s Guide 527 Appendix L Command Interpreter...
Страница 529: ...Prestige 662HW Series User s Guide 529 Appendix M Firewall Commands...
Страница 533: ...Prestige 662HW Series User s Guide 533 Appendix N NetBIOS Filter Commands...
Страница 535: ...Prestige 662HW Series User s Guide 535 Appendix O Brute Force Password Guessing Protection...