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 | ||||||||
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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 | |||||||||
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Connect Local Site (I External IP address = 253 Internal IP addresses)
9
