Configuring ServicesL2TP Settings

1. To change global L2TP settings, select ServicesL2TP. The ServicesL2TP screen appears.

Figure 10 ServicesL2TP screen



2. Configure L2TP authentication. L2TP settings allow you to select a specific authentication server type; for example, RADIUS. Each server type allows you to specify an authentication scheme: MS-CHAP, CHAP, PAP, None or PAP or CHAP.
   
   

   Note: Not all RADIUS servers support all forms of authentication. Failure to match PPP authentication methods with RADIUS server capabilities results in user-authentication failures. Check your vendor's RADIUS documentation for additional information.

   
   
3. To enable PPP Multilink, select Enabled in the list box.
4. Configure L2TP Authentication Order. The Authentication Order table lists the corresponding servers, authentication types, associated groups, and actions. The LDAP server is always queried first, then RADIUS, if applicable.
5. Configure L2TP Access Concentrators.
• Delete-Click to remove the configured concentrator. You are prompted to confirm your deletion request.
• Add-Click to go to the Add L2TP Access Concentrator screen.
• Edit-Click to go to the Edit L2TP Access Concentrator screen and modify the settings of an existing concentrator.

The L2TP Add Access Concentrators screen allows you to configure the authentication between the gateway and the NAS. Use the Edit Access Concentrators screen to modify the information for an existing concentrator.