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Additional resources for Access VPN Solutions Using Tunneling Technology
Both sides authenticate with the method negotiated during LCP. The Cisco AS5300 is authenticating the client using CHAP. 551 The state is open for IP Control Protocol (IPCP). 1. Failed authentication is a common occurrence. Misconfigured or mismatched usernames and passwords create error messages in debug output. The following example shows that the username sam-admin does not have permission to dial in to the NAS, which does not have a local username configured for this user. 539: As2 As2 As2 As2 As2 LCP: State is Open PPP: Phase is AUTHENTICATING, by this end CHAP: O CHALLENGE id 1 len 28 from "ISP_NAS" CHAP: I RESPONSE id 1 len 30 from "sam-admin" CHAP: Unable to validate Response.
The home gateway 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 determines the tunnel endpoint information. Configuring the Access VPN To configure the NAS and home gateway to work as an access VPN, follow these steps: • • Step 1—Configuring the NAS Step 2—Configuring the Home Gateway Step 1—Configuring the NAS In this step, the ISP configures the NAS for VPN using local AAA.
Pagoda# vi vpdn Open a vi editor session and create a file called vpdn. 25" } The vpdn file contains all the VPN RADIUS authentication and authorization attributes needed for the home gateway user. In this file: • 2= defines the IETF RADIUS password attribute. ” The vpdn profile is the one and only profile that actually interfaces directly with Cisco IOS software. Cisco’s implementation of RADIUS needs a password to operate; for security reasons, that password should not reside on the NAS. Cisco has hard-coded the password “cisco” in Cisco IOS to address this security issue.
Access VPN Solutions Using Tunneling Technology