Draytek 2910 User Name, Medium -Authentication Header AH means data will be, Callback Function

	select above will apply the authentication methods and
	security methods in the general settings.
User Name	This field is applicable when you select ISDN, PPTP or L2TP
	with or without IPSec policy above.
Password	This field is applicable when you select ISDN, PPTP or L2TP
	with or without IPSec policy above.

IKE Authentication Method This group of fields is applicable for IPSec Tunnels and L2TP with IPSec Policy when you specify the IP address of the remote node. The only exception is Digital Signature (X.509) can be set when you select IPSec tunnel either with or without specify the IP address of the remote node.

Pre-Shared Key - Check the box of Pre-Shared Key to invoke 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 in the X.509 Peer ID Profiles (set from 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 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 - 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.
Callback Function	The callback function provides a callback service only for the
	ISDN dial-in user (for i model only). The remote user will be
	charged the connection fee by the telecom.
	Check to enable Callback function-Enables the callback
	function.
	Specify the callback number-The option is for extra security.
	Once enabled, the router will ONLY call back to the specified
	Callback Number.
	Check to enable callback budget control-By default, the
	callback function has a time restriction. Once the callback
	budget has been exhausted, the callback mechanism will be
	disabled automatically.
	Callback Budget (Unit: minutes)- Specify the time budget
	for the dial-in user. The budget will be decreased
	automatically per callback connection.

104 Vigor2910 Series User’s Guide