Quatech WLNG-ET-DP500 Series - Manual (Page 31)

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100-8081-100 Airborne CLI Reference Manual 31
9.0 Ethernet Bridge Use
The Airborne Ethernet Bridge is a fully functional NAT Level 3 router, supporting a public
IP address for the wireless interface and a private network for the attached devices on
the wired interface.
Network Address Translation (NAT) is the process of modifying network address
information in datagram packet headers while in transit across a traffic routing device for
the purpose of remapping a given address space into another. In the case of a NAT Level
3 device, the modification of the packet headers provides for a translation between a
single public IP address (that of the wireless interface) and the IP address of the devices
on the private network (wired Ethernet interface).
The Airborne Bridge wireless interface is considered the public address and will be the
point of contact on the target network (see Figure 5). This interface supports all the
wireless and network authentication requirements including support for WPA2-Enterpise.
It can acquire an IP address through both DHCP or user configured static IP.
Configuration, association and authentication is handled entirely by the Airborne Bridge
and requires no interaction from the wired host on the private network.
Figure 5 - Ethernet Bridge Functionality