D-Link DI-1750 Reference Manual page 519

Please Input the code of command to be execute(0-1): 00
Current Status:vpdn Current Directory: config
Key Word:
Q(quit)
(00)authentication tunnel Authentication
(01)hello set the interval of sending Hello packet
(02)password password tunnel for authentication
(03)receive-window set the size for control channel Receive window
Please Input the code of command to be execute(0-3): 02
Current Status:vpdn Current Directory: config
Key Word:
Q(quit)
(00)WORD tunnel password
Please Input the code of command to be execute(0-0): 00
Please Input a string: 123456
Will you execute it? [Y]:y
Then, at the other end of L2TP tunnel, i.e. LNS, configure the "L2tp tunnel authen" and "l2tp tunnel pass 123456"
just as ongoing.
15.1.13 set tunnel password
If LNS and LAC configured tunnel authentication, the authentication will not succeed until both sides of
tunnel are configured the same password, tunnel password at least includes 254 characters. The
command as below:
L2tp tunnel password
L2tp(undo) tunnel password
Key Word:
U(undo) D(default) Q(quit)
......
(13)interface interface configuration
(14)l2tp L2TP specific commands
......
Please Input the code of command to be excute(0-29):14（select l2tp）
Key Word:
U(undo) D(default) Q(quit)
(00)tunnel L2TP tunnel commands
(01)hidden
Please Input the code of command to be excute(0-1): 0
Input 0，select tunnel：
Key Word:
Q(quit)
(00)authentication
(01)hello Hello packet interval
(02)password
(03)receive-window Receive window size for control channel
Please Input the code of command to be excute(0-3): 2(select password)
Key Word:
Q(quit)
<00> WORD password
Please Input the code of command to be excute(0-1):0
Please input a string:word（input password, for example word）
Will you excute it? (Y/N):y
Command
password
password
Allow AVPs to be hidden
Authenticate tunnel
Tunnel password for authentication and/or AVP hiding
Model Name
Set tunnel password.
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Function