This chapter introduced you to Cisco VPN 3000 series concentrators. I discussed and compared the various models that Cisco sells, and introduced you to the two configuration interfaces the concentrator offers: CLI and GUI. Now that you have a basic understanding of how to interact with the concentrator, the next set of chapters in this part will focus on configuring remote access and site-to-site sessions, managing the concentrator, and troubleshooting connections.
Next up is Chapter 7, "Concentrator Remote Access Connections with IPsec," where I show you how to set up a concentrator to accept remote access connections that use IPsec. Remote acccess solutions using PPTP, L2TP, and WebVPN will be discussed in Chapter 8, "Concentrator Remote Access Connections with PPTP, L2TP, and WebVPN."