Draytek Vigor2830 Series User Manual page 230

Item
IPSec Security Method
After finishing all the settings here, please click OK to save the configuration.
Vigor2830 Series User's Guide
Description
this function and type in the required characters (1-63) as the
pre-shared key.
Digital Signature (X.509) – Check the box of Digital
Signature to invoke this function and Select one predefined
Profiles set in the VPN and Remote Access >>IPSec Peer
Identity.
This group of fields is a must for IPSec Tunnels and L2TP
with IPSec Policy when you specify the remote node. Check
the Medium, DES, 3DES or AES box as the security method.
Medium-Authentication Header (AH) means data will be
authenticated, but not be encrypted. By default, this option is
invoked. You can uncheck it to disable it.
High-Encapsulating Security Payload (ESP) means payload
(data) will be encrypted and authenticated. You may select
encryption algorithm from Data Encryption Standard (DES),
Triple DES (3DES), and AES.
Local ID (optional)- Specify a local ID to be used for Dial-in
setting in the LAN-to-LAN Profile setup. This item is optional
and can be used only in IKE aggressive mode.
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