ZyXEL Communications ZyXEL ZyWALL 35 - Manual (Page 571)

ZyWALL 35 User’s Guide
Chapter 44 VPN/IPSec Setup 569
44.5 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.
44.5.1 Active Protocol
This field is a combination of mode and security protocols used for the VPN. See Chapter 13
Introduction to IPSec for more information on these parameters.
44.5.2 Security Parameter Index (SPI)
To edit this menu, move the cursor to the Edit Manual Setup field in Menu 27.1.1 – IPSec
Setup, press [SPACE BAR] to select Yes and then press [ENTER] to go to Menu 27.1.1.2 –
Manual Setup.
Encapsulation Press [SPACE BAR] to choose from Tunnel mode or Transport mode and then press
[ENTER]. See earlier for a discussion of these.
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).
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.
Table 209 Menu 27.1.1.1: IKE Setup (continued)
FIELD DESCRIPTION
Table 210 Active Protocol: Encapsulation and Security Protocol
MODE SECURITY PROTOCOL
Tunnel ESP
Transport AH