Draytek 5500 Series manual IPSec Peer Identity, IPSec Security Method

	Pre-Shared Key- Specify a key for IKE authentication
	Confirm Pre-SharedKey-Confirm the pre-shared key.
IPSec Security Method	Medium - Authentication Header (AH) means data will be
	authenticated, but not be encrypted. By default, this option is
	active.
	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.

3.11.4 IPSec Peer Identity

To use digital certificate for peer authentication in either LAN-to-LAN connection or Remote User Dial-In connection, here you may edit a table of peer certificate for selection. As shown below, the router provides 200 entries of digital certificates for peer dial-in users.

Set to Factory Default	Click it to clear all indexes.
Index	Click the number below Index to access into the setting page
	of IPSec Peer Identity.
Name	Display the profile name of that index.

Click each index to edit one peer digital certificate. There are three security levels of digital signature authentication: Fill each necessary field to authenticate the remote peer. The following explanation will guide you to fill all the necessary fields.

106 VigorPro5500 Series User’s Guide