ZyXEL NBG-460N User Guide - Page 205
The SA Monitor Screen
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Chapter 15 IPSec VPN Table 67 Security > VPN > General > Rule Setup: Manual (continued) LABEL DESCRIPTION IPSec Protocol Select the security protocols used for an SA. Both AH and ESP increase processing requirements and communications latency (delay). Encryption Algorithm If you select ESP here, you must select options from the Encryption Algorithm and Authentication Algorithm fields (described below). Select which key size and encryption algorithm to use in the IKE SA. Choices are: DES - a 56-bit key with the DES encryption algorithm 3DES - a 168-bit key with the DES encryption algorithm Encryption Key The NBG-460N and the remote IPSec router must use the same algorithms and keys. Longer keys require more processing power, resulting in increased latency and decreased throughput. This field is applicable when you select ESP in the IPSec Protocol field above. Authentication Algorithm Authentication Key Apply Reset Cancel With DES, type a unique key 8 characters long. With 3DES, type a unique key 24 characters long. Any characters may be used, including spaces, but trailing spaces are truncated. Select which hash algorithm to use to authenticate packet data in the IPSec SA. Choices are SHA1 and MD5. SHA1 is generally considered stronger than MD5, but it is also slower. Type a unique authentication key to be used by IPSec if applicable. Enter 16 characters for MD5 authentication or 20 characters for SHA-1 authentication. Any characters may be used, including spaces, but trailing spaces are truncated. Click Apply to save your changes back to the NBG-460N. Click Reset to begin configuring this screen afresh. Click Cancel to exit the screen without making any changes. 15.5 The SA Monitor Screen In the Web Configurator, click Security > VPN > SA Monitor. Use this screen to display and manage active VPN connections. NBG-460N User's Guide 205