ZyXEL Communications Internet Security Gateway ZyWALL 2 Series - Manual (Page 520)

ZyWALL 2 Series User’s Guide
37-14 VPN/IPSec Setup
Table 37-3 Menu 27.1.1.1: IKE Setup
FIELD DESCRIPTION EXAMPLE
Encapsulation Press [SPACE BAR] to choose from Tunnel mode or Transport mode and
then press [ENTER]. See earlier for a discussion of these.
Tunnel
Perfect
Forward
Secrecy (PFS)
Perfect Forward Secrecy (PFS) is disabled (None) by default in phase 2
IPSec SA setup. This allows faster IPSec setup, but is not so secure. Press
[SPACE BAR] and choose from DH1 or DH2 to enable PFS. DH1 refers to
Diffie-Hellman Group 1 a 768 bit random number. DH2 refers to Diffie-Hellman
Group 2 a 1024 bit (1Kb) random number (more secure, yet slower). None
When you have completed this menu, press [ENTER] at the prompt “Press ENTER to Confirm…” to save
your configuration, or press [ESC] at any time to cancel.
37.5 Manual Setup
You only configure Menu 27.1.1.2 – Manual Setup when you select Manual in the Key Management field
in Menu 27.1.1 – IPSec Setup. Manual key management is useful if you have problems with IKE key
management.
37.5.1 Active Protocol
This field is a combination of mode and security protocols used for the VPN. See the Web Configurator
User’s Guide for more information on these parameters.
Table 37-4 Active Protocol: Encapsulation and Security Protocol
MODE SECURITY PROTOCOL
Tunnel ESP
Transport AH
37.5.2 Security Parameter Index (SPI)