Remote access involves
connecting individual users to a LAN to provide secure, encrypted network access
for telecommuters, traveling employees, and one-person offices of consultants,
contractors, brokers, vendors, and so forth.
Today, many companies provide their own VPN connections through
the Internet, allowing access to remote users running VPN client software over
dial-up technologies through their Internet service providers (ISPs). The rapid
expansion of cable and DSL markets makes it possible for telecommuters and other
fixed location users to replace slower modem and ISDN services with fast
connections at a fraction of the cost of dedicated lines.
Fast Internet connections offered in many hotels and the new
wireless access facilities in many public places, such as airports, convention
centers, and even fast-food restaurants, means traveling employees can also use
fast, secure, remote VPN connections. Figure 14-10 shows two common
types of remote access VPN examples.
Figure 14-10: Remote
access type VPN connections
Remote access VPN implementations with VPN Concentrators is
covered in the upcoming section “Remote Access VPNs with Preshared Keys.” Chapter 15 covers
the VPN 3002 client device, which allows a single appliance to provide remote
access VPN connectivity and protection to small groups at a single