Setting Up a Secure Connection Between the Client PC and an E Series Router

You can set up a secure connection between the client PC and an E Series router. Figure 23 gives an overview of the process used to set up a secure connection between the client PC and an E Series router that is acting as a VPN provider.

Figure 23: L2TP/IPsec Connection

L2TP/IPsec Connection

To set up a secure connection:

  1. Obtain an IP address from your ISP, using a normal B-RAS termination.
  2. Internet Key Exchange (IKE) signals a security association (SA) between the client PC and the E Series router that is acting as a VPN provider.
    • SAs are established to secure data traffic.
    • The IPsec connection secures L2TP traffic.
  3. Set up an L2TP tunnel and session between the client PC (the LAC) and the E Series router (the LNS).

    The tunnel runs over the SAs that IKE established.

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