32 Chapter 1 Introduction300868-GIP networksFor security purposes, on an IP network, you may want to isolate your networkfrom the Internet. You can isolate your network from the Internet by configuringthe network workstations to go through a router before accessing the Internet.However, using a router to isolate the LAN can be very time-consuming to set upand maintain because each LAN user must have a “legal” IP address and beprotected from hackers. Instant Internet, on the other hand, makes it easy to isolateyour IP network from the Internet by using address translation to translate illegal(reserved private) LAN workstation IP addresses into legal IP addresses.You can also configure IP security (IPsec) to use a virtual private network (VPN).A VPN is a special type of connection that permits remote users or LANs tocommunicate with another LAN over a public network, such as the Internet.When you set up a VPN, you are essentially using a public network as your ownprivate, secure network.On IP networks with IP workstations, there is no limit to the number ofapplication sessions (instances) that can access the Instant Internet unit.IPX networksAn IPX network is automatically secure because there is no IP traffic on thenetwork. In this type of network, Instant Internet provides quick and easy accessto the Internet. On IPX networks with IPX workstations, Instant Internet supportsup to 250 application sessions.This means that IPX workstations can access theInstant Internet unit using up to 250 application instances.
