ZyXEL MAX218M2W User Guide - Page 144
Technical Reference, 8.12.1 IPSec Architecture, Table 60, LABEL, DESCRIPTION
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Chapter 8 Security Table 60 IPSec VPN: Add (continued) LABEL DESCRIPTION Perfect Forward Secrecy (PFS) Select whether or not you want to enable Perfect Forward Secrecy (PFS). PFS changes the root key that is used to generate encryption keys for each IPSec SA. The longer the key, the more secure the encryption, but also the longer it takes to encrypt and decrypt information. Both routers must use the same DH key group. Save Click Apply to save your changes back to the WiMAX Device. Cancel Click Cancel to restore your previous settings. 8.12 Technical Reference This section provides some technical background information about the topics covered in this section. 8.12.1 IPSec Architecture The overall IPSec architecture is shown as follows. Figure 80 IPSec Architecture 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. 144 WiMAX Device Configuration User's Guide