Multi-Tech Systems RF802EW Typical Applications, Connecting a Remote Site via Cable Modem, Kernal

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)

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