Velocity Edge GX440 User's Guide Page 68

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ALEOS 4.3.4 Software Configuration User Guide
68 4114514
Figure 4-1: Private vs. Public Mode
Private Mode
Private Mode uses Network Address Translation (NAT) to enable the non-routable
device to access the Internet. Data from the connected devices can be passed
through the AirLink device and AirLink device applications such as SNMP have a
routable IP address to target.
In a business continuity application where the router also has a routable IP
address from a wireline gateway connection (as shown in Figure 4-2) the IT
administrator may prefer to use that lower cost connection for AirLink device
SNMP applications and use the reliable static route failover protocol to direct
SNMP-like traffic out the wireline gateway connection, unless that connection has
failed.
Internet Internet
AirLink device
AirLink device
Router or laptop
Router or laptop
Non-routable IP address
Private mode
Public mode
NAT to port with non-routable
IP address
Routable IP address
Routable IP address
Note: Router with NAT configured for AirLink device traffic can have a
routable IP address from a wireline gateway. See Figure 4-2.
Non-routable IP address
Non-routable IP address
Non-routable IP address
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