Summary

This chapter introduced you to the mechanics of VPDNs and some of the L2 protocols that make its operation possible, including L2TP, L2F, and PPTP. With the help of these protocols, a remote client can securely communicate with a private corporate network via a virtual tunnel over a public network. The case studies taught you how to create a working VPDN environment by configuring several Cisco devices, including the following:

  • Routers as a client

  • LAC/NAS

  • LNS/home gateway

  • PIX Firewall as a PPTP network server

  • Cisco ACS with a VPDN-related configuration

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