Ipsec Summary; Figure 29-3 Ipsec Summary Fields; Table 29-1 Ah And Esp - ZyXEL Communications 10 User Manual

Select DES for minimal security and 3DES for maximum.
Select NULL to set up a tunnel without encryption.
DES (default)
Data Encryption Standard (DES) is a widely used method
of data encryption using a private (secret) key. DES
applies a 56-bit key to each 64-bit block of data.
3DES
Triple DES (3DES) is a variant of DES, which iterates
three times with three separate keys (3 x 56 = 168 bits),
effectively doubling the strength of DES.

29.3 IPSec Summary

Type 1 in menu 27 and then press [ENTER] to display Menu 27.1 — IPSec Summary. This is a summary
read-only menu of your IPSec rules (tunnels). Edit or create an IPSec rule by selecting an index number and
then configuring the associated submenus.
The following figure helps explain the main fields in menu 27.1.
Local and remote IP addresses must be static.
29.3.1 Keep Alive
A tunnel with no outbound or inbound traffic is "idle" and stays connected until the IPSec SA lifetime period
expires (see section 29.5). The ZyWALL automatically renegotiates the IPSec SA if there is traffic when the
VPN/IPSec Setup

Table 29-1 AH and ESP

ESP

Figure 29-3 IPSec Summary Fields

ZyWALL 10~100 Series Internet Security Gateway
Select MD5 for minimal security and SHA-1 for
maximum security.
MD5 (default)
MD5 (Message Digest 5) produces a 128-bit
digest to authenticate packet data.
SHA1
SHA1 (Secure Hash Algorithm) produces a
160-bit digest to authenticate packet data.
AH
29-3