ZyXEL Communications ADSL VoIP IAD with 802.11g Wireless 2602HW Series - Manual (Page 412)

Prestige 2602HW Series User’s Guide
412 Chapter 42 VPN/IPSec Setup
42.5 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.
42.5.1 Active Protocol
This field is a combination of mode and security protocols used for the VPN. See the Web
Configurator part on VPN for more information on these parameters.
42.5.2 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.
Key Group You must choose a key group for phase 1 IKE setup. DH1 (default) refers to Diffie-
Hellman Group 1 a 768 bit random number. DH2 refers to Diffie-Hellman Group 2 a
1024 bit (1Kb) random number.
Phase 2
Active Protocol Press [SPACE BAR] to choose from ESP or AH and then press [ENTER]. See earlier
for a discussion of these protocols.
Encryption
Algorithm
Press [SPACE BAR] to choose from NULL, DES, 3DES or AES and then press
[ENTER]. Select NULL to set up a tunnel without encryption.
Authentication
Algorithm
Press [SPACE BAR] to choose from SHA1 or MD5 and then press [ENTER].
SA Life Time
(Seconds)
Define the length of time before an IPSec Security Association automatically
renegotiates in this field. It may range from 60 to 3,000,000 seconds (almost 35 days).
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
or ESC to Cancel: ” to save your configuration, or press [ESC] at any time to cancel.
Table 135 Menu 27.1.1.1 IKE Setup (continued)
FIELD DESCRIPTION
Table 136 Active Protocol: Encapsulation and Security Protocol
MODE SECURITY PROTOCOL
Tunnel ESP
Transport AH