Access VPN Solutions Using Tunneling Technology

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The NAS and home gateway authenticate the tunnel by using their local username databases, which contain the tunnel secret. Once the tunnel is established, the NAS forwards the call to the home gateway. • The CiscoSecure NT server authenticates the username, jeremy, and assigns the client an IP address. ) • The client and the home gateway can now exchange PPP packets. The NAS now acts as a transparent PPP frame forwarder. com, and supplies the NAS with the tunnel endpoint information. Configuring the Access VPN To configure the access VPN solution to work with remote AAA, follow these steps: • • • • Step 1—Configuring the NAS Step 2—Configuring the Home Gateway Step 3—Configuring the CiscoSecure ACS UNIX Server Step 4—Configuring the CiscoSecure ACS NT Server Step 1—Configuring the NAS In this step, the ISP: • Moves the responsibilities for domain name authentication and tunnel endpoint determination from the NAS to the remote CiscoSecure UNIX server • • Points the NAS to the CiscoSecure UNIX server Removes unnecessary commands Use this command To do this ISP_NAS(config)# aaa authentication ppp default local radius Instruct AAA to first use the local database and then use the RADIUS server (CiscoSecure NT) for PPP and VPN authentication.

Note The NAS and the home gateway must both have the same usernames with the same password. These usernames are not related to client authentication. ISP_NAS(config)# aaa authentication ppp default local ISP_NAS(config)# aaa authorization network default local Authenticate the tunnel between the remote peers and authorize the tunnel at the NAS. The tunnel authorization phase includes an authentication step. The tunnel must be authenticated before it can be authorized. 1 ISP_NAS(config)# interface group-async 1 ISP_NAS(config-if)# no peer default ip address pool default ISP_NAS(config-if)# exit Remove the local IP address pool from the NAS.

Hostname ISP_NAS ! LCf0 ! username jane-admin password 7 0501090A6C5C4F1A0A1218000F username ENT_HGW password 7 104D000A0618 username ISP_NAS password 7 13061E010803 vpdn enable ! com local name ISP_NAS ! 140 isdn switch-type primary-5ess ! controller T1 0 framing esf clock source line primary linecode b8zs pri-group timeslots 1-24 ! controller T1 1 framing esf clock source line secondary linecode b8zs pri-group timeslots 1-24 ! controller T1 2 framing esf clock source internal linecode b8zs pri-group timeslots 1-24 !

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