Contemporary Controls has added a wireless option to the EIPR-E Skorpion IP router making the automation firewall/router more useful as well as providing the USB port without a price increase.
The device is an industrial grade Ethernet-to-Ethernet router with a built-in 4-port Ethernet switch. Wireless connectivity is accomplished through the USB port, and supports a variety of Wi-Fi USB modules. The EIPR-E offers Wi-Fi access point functionality allowing end devices such as PCs or Wi-Fi controllers to connect to the router and then to the Internet. In addition, the device supports WEP, WPA and WPA2 Wi-Fi security.
The wireless router links two Internet Protocol networks together, passing appropriate traffic while blocking all other traffic. One of the networks is a designated local area network (LAN) while the other is a wide area network (WAN). Because of the built-in firewall, communications initiated on the LAN side pass through the router while WAN-side initiated communications are blocked.
With Port Address Translation (PAT), several clients on the LAN side can gain access to the Internet. With Network Address Translation (NAT) there can be a one-to-one translation between LAN-side and WAN-side addresses.
The firewall can be disabled when appro-priate, such as when using the IP router to connect two subnets together within a private intranet. This allows communication sessions to originate from either side of the router. In this situation, NAT and port forwarding are meaningless. Although the firewall is disabled, the router will continue to block broadcast messages from passing between the two sides of the router.
With port forwarding, servers on the LAN side can be accessed from the Internet via the WAN-side port. The EIPR-E incorporates a four-port 10/100 Mbps Ethernet switch for multiple LAN-side connections. An external Ethernet-based modem – cable or DSL – attached to the 10/100 Mbps WAN-side port can be used to connect to the Internet. DSL modems connect via the PPPoE protocol.
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