Draytek VIGOR2850N Guia do Utilizador descarregar pdf (Página 221)

Vigor2850 Series User’s Guide

211

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 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 LAN-to-LAN connection (this feature is useful

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 limitation of callback period.

Once the callback budget is exhausted, the function will be

disabled automatically.

Callback Budget - Specify the time budget for the dial-in

user. The budget will be decreased automatically per

callback connection. The default value 0 means no

limitation of callback period.

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Draytek VIGOR2850N Guia do Utilizador Página 221