User's Manual

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SMCD3GN2 Wireless Cable Modem Gateway Administrator Manual
8. To change the settings for a PPTP user, click the radio button to the left of the PPTP user
you want to change and click the Edit button. When the Adding PPTP User menu appears,
edit the settings (see Table 35) and click Apply. Click Apply in the VPN – PPTP / L2TP
User Configuration menu to save your settings.
9. To delete a PPTP user, click the radio button to the left of the PPTP user you want to
delete and click the Delete button. No precautionary message appears before you delete a
PPTP user. Click Apply in the VPN – PPTP / L2TP User Configuration menu to save your
settings.
Table 35. Adding PPTP User Menu Options
Option Description
User Name Username used to authenticate the PPTP/L2TP user.
Password Password used to authenticate the PPTP/L2TP user.
Defining L2TP / IPSec pre-shared Phrase
The configuration of L2TP with IPSec requires that all VPN clients and gateways use the
same pre-shared key (or “phrase”). If the pre-shared phrase is changed because it has been
compromised, you must manually change the phrase on each device that uses a pre-shared
phrase to connect to the VPN gateway. A pre-shared phrase can be up to 256 characters.
The longer and more complex the phrase, the harder it is to guess.
Using the VPN – PPTP / L2TP User Configuration menu, you can define the pre-shared
phrase that the Gateway uses.
1. Click VPN in the menu bar.
2. On the VPN menu, uncheck one of the following options and click Apply (see Figure 83).
Otherwise, the buttons for adding, editing, and deleting the VPN – PPTP / L2TP
configurations on the VPN – PPTP / L2TP User Configuration menu will be unavailable.
– Disable PPTP VPN Functions
– Disable L2TP over IPsec VPN Functions
3. In the menu bar, under VPN, click the PPTP/L2TP Configuration submenu.
4. In the VPN – PPTP/L2TP User Configuration menu, under L2TP/IPsec Pre-Shared
Phrase, enter the pre-shared phrase in the Pre-Shared Phrase field (see Figure 89).
5. Click the Apply button.
Figure 89. Pre-Shared Phrase Field