Vigor2920 Series User’s Guide 
161
User Name 
This field is applicable when you select, PPTP or L2TP with or 
without IPSec policy above. 
Password 
This field is applicable when you select PPTP or L2TP with or 
without IPSec policy above. 
PPP Authentication 
This field is applicable when you select, PPTP or L2TP with or 
without IPSec policy above. PAP/CHAP is the most common 
selection due to wild compatibility.
VJ compression 
This field is applicable when you select PPTP or L2TP with or 
without IPSec policy above. VJ Compression is used for 
TCP/IP protocol header compression. Normally set to 
Yes
to 
improve bandwidth utilization. 
IKE Authentication 
Method
This group of fields is applicable for IPSec Tunnels and L2TP 
with IPSec Policy. 
Pre-Shared Key 
- Input 1-63 characters as pre-shared key. 
Digital Signature (X.509)
- Select one predefined Profiles set 
in the 
VPN and Remote Access >>IPSec Peer Identity
. 
IPSec Security Method 
This group of fields is a must for IPSec Tunnels and L2TP with 
IPSec Policy. 
Medium 
Authentication Header (AH)
means data will be authenticated, 
but not be encrypted. By default, this option is active. 
High (ESP-Encapsulating Security Payload)-
means payload 
(data) will be encrypted and authenticated. Select from below: 
DES without Authentication
-Use DES encryption algorithm 
and not apply any authentication scheme. 
DES with Authentication-
Use DES encryption algorithm and 
apply MD5 or SHA-1 authentication algorithm. 
3DES without Authentication
-Use triple DES encryption 
algorithm and not apply any authentication scheme. 
3DES with Authentication-
Use triple DES encryption 
algorithm and apply MD5 or SHA-1 authentication algorithm. 
AES without Authentication
-Use AES encryption algorithm 
and not apply any authentication scheme. 
AES with Authentication-
Use AES encryption algorithm and 
apply MD5 or SHA-1 authentication algorithm. 
Advanced 
Specify mode, proposal and key life of each IKE phase, 
Gateway, etc. 
The window of advance setup is shown as below: 
IKE phase 1 mode -
Select from 
Main 
mode and 
Aggressive
mode. The ultimate outcome is to exchange security proposals 
to create a protected secure channel. 
Main
mode is more secure 
than 
Aggressive 
mode since more exchanges are done in a 
secure channel to set up the IPSec session. However, the 
VoIPon 
www.voipon.co.uk 
Tel: +44 (0)1245 808195 
Fax: +44 (0)1245 808299