User guide

Introduction
1-2
Applications
Many advanced applications are provided by the CheetahAccess Internet Gateway,
such as:
• LAN Access
The CheetahAccess Internet Gateway provides connectivity to 10/100
Mbps devices, making it easy to create a network in small offices or
homes.
• Internet Access
This device supports Internet access through an xDSL, Cable, ISDN or
PSTN connection. Since many DSL providers use PPPoE to establish
communications with end users, the CheetahAccess Internet Gateway
includes a built-in client for this protocol, eliminating the need to install
this service on your computer.
• Shared IP Address
The CheetahAccess Internet Gateway provides Internet access for up to
253 users with a shared IP address. Using only one ISP account,
multiple users on your network can browse the Web at the same time.
• Virtual Server
If you have a fixed IP address, you can set up the CheetahAccess
Internet Gateway to act as a virtual host for network address translation.
Remote users access various services at your site using a constant IP
address. Then, depending on the requested service (or port number),
the CheetahAccess Internet Gateway can route the request to the
appropriate server (at another internal IP address). This secures your
network from direct attack by hackers, and provides more flexible
management by allowing you to change internal IP addresses without
affecting outside access to your network.
• User-Definable Application Sensing Tunnel
You can define special applications that require multiple connections
such as Internet gaming, videoconferencing, and Internet telephony.
The CheetahAccess Internet Gateway can then sense the application
type and open a multi-port tunnel for it.
• DMZ Host Support
Allows a networked computer to be fully exposed to the Internet. This
function is used when the special application sensing tunnel feature is
insufficient to allow an application to function correctly.