Billion 7800DX, Руководство пользователя

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L2TP Client
L2TP client can help you dial-in the L2TP server to establish L2TP tunnel over Internet.
Name:
user-defined name for identification.
L2TP over IPSec:
If your L2TP server has used L2TP over IPSec feature, please enable this item.
under this circumstance, client and server communicate using L2TP over IPSec.

Enable
IPSec Tunnel:
Select the appropriate IPSec for L2TP rule configured for the L2TP Client.
Username:
Enter the username provided by your L2TP Server.
Password:
Enter the password provided by your L2TP Server.
Auth. Type:
Default is Pap or CHap if you want the router to determine the authentication type to
use, or else manually specify CHAP (Challenge Handshake Authentication Protocol) or PAP
(Password Authentication Protocol) if you know which type the server is using. When using PAP, the
password is sent unencrypted, whilst CHAP encrypts the password before sending, and also allows
for challenges at different periods to ensure that an intruder has not replaced the client.
L2TP Server Address:
Enter the IP address of the L2TP server.