Multi-Tech Systems RF802EW - Manual (Page 9)

9
Chapter 1 - Introduction
Typical Applications
The following examples provide information about typical applications using the RF802EW. They
describe using the RF802EW to connect a remote site via a cable modem, using the RF802EW
to segment a local area network, and using the RF802EW to connect a LAN to the Internet using
one shared IP address.
Connecting a Remote Site via Cable Modem
In the following example the RF802EW is used to connect a LAN to the Internet via DSL or a
cable modem.
Kernal: NAT (outgoing TCP/IP connection sharing a single Internet IP address or
using multiple IP mapping)
• Virtual Server (allowing incoming specific TCP/IP service request redirect
to an internal server)
• Static Routing (Routing table setting to Internal Local Gateways)
• Firewall
External: Fixed External Port IP or DHCP client (Dynamic IP assigned)
Internal: Device Fixed IP
DHCP Server
Connect Remote Site via Cable Modem
Connecting a Local Site to the Internet
In this application, the RF802EW is used to connect up to 253 Internal IP addresses to the
Internet using a single shared external IP address.
Kernal: NAT (outgoing TCP/IP connection sharing single External Port IP or using
multiple IP Mapping)
• Virtual Server
(allow incoming specific TCP/IP service request redirect to internal
server)
• Firewall
External: Fixed External Port IP and mask DNS IP, Gateway IP or DHCP client
(Dynamic IP for the device, DNS and Gateway assigned.)
Internal: Device Fixed IP
DHCP Server
Connect Local Site (I External IP address = 253 Internal IP addresses)