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46 Access VPN Solutions Using Tunneling Technology Verifying the Access VPN ENT_HGW(config-if)# ip unnumbered fastethernet0/0 Specify that the virtual-access interfaces use the Fast Ethernet 0/0 interface’s IP address. ENT_HGW(config-if)# ppp authentication chap Enable CHAP authentication using the local username database. ENT_HGW(config-if)# peer default ip address pool default Return an IP address from the default pool to the client. ENT_HGW(config-if)# encapsulation ppp Enable PPP encapsulation.
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. ISP_NAS(config)# no username jeremy password subaru Remove the client’s username and password from the local AAA database. The client is assigned an IP address from the home gateway’s local IP address pool.
Remove the VPN1 group. All of the tunneling information will now be retrieved using RADIUS at the CiscoSecure UNIX server. ISP_NAS(config)# no vpdn-group 1 1. The Cisco IOS command syntax uses the more specific term virtual private dialup network (VPDN) instead of VPN. Step 2—Configuring the Home Gateway In this step, the enterprise customer: • Moves the responsibility for username authentication from the NAS to the remote CiscoSecure NT server • • Points the home gateway to the CiscoSecure NT server Removes the client’s username and password from the home gateways username database Use this command To do this ENT_HGW(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.