Ipsec Algorithms; Key Management; Encapsulation; Figure 91 Ipsec Architecture - ZyXEL Communications Prestige 662H Series User Manual
Adsl 2+ 4-port security gateway
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Figure 91 IPSec Architecture
18.2.1 IPSec Algorithms
The ESP (Encapsulating Security Payload) Protocol (RFC 2406) and AH (Authentication
Header) protocol (RFC 2402) describe the packet formats and the default standards for packet
structure (including implementation algorithms).
The Encryption Algorithm describes the use of encryption techniques such as DES (Data
Encryption Standard) and Triple DES algorithms.
The Authentication Algorithms, HMAC-MD5 (RFC 2403) and HMAC-SHA-1 (RFC 2404,
provide an authentication mechanism for the AH and ESP protocols. Please see
Algorithms section
18.2.2 Key Management
Key management allows you to determine whether to use IKE (ISAKMP) or manual key
configuration in order to set up a VPN.
18.3 Encapsulation
The two modes of operation for IPSec VPNs are Transport mode and Tunnel mode.
Chapter 18 Introduction to IPSec
for more information.
Prestige 662H/HW Series User's Guide
the IPSec
214
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