System information

Web Manager "Network" Menu Options 281
Configuring Private Subnets and Virtual Networks
The OnBoard derives the range of addresses in the subnet from the OnBoard-
side IP address and the subnet mask. The OnBoard uses the specified
information to create a route to the subnet in the OnBoard’s routing table.
The example in Figure 8-16 shows a private subnet name of “net1,” an
OnBoard side IP address of 192.168.0.254, and a subnet netmask of
255.255.255.0.
Figure 8-16:Network → Private Subnets: Add Subnet Dialog
The example in Figure 8-16 shows a private subnet name of “net1,” an
OnBoard side IP address of 192.168.0.254, and a subnet netmask of
255.255.255.0. The private subnet address derived from this configuration is
192.168.0.0. Since the broadcast address is 192.168.0.255 (by convention)
and the OnBoard’s address is 192.168.0.254, the administrator can assign an
address between 192.168.0.1 and 192.168.0.253 when configuring a
connected device.
Configuring a Virtual Network (DNAT)
The administrator should define a virtual network based on Destination
Network Address Translation (DNAT) in the following cases:
• When it is desired that multiple non-contiguous private subnets be
supported by a single network route (or, in the case of IPSec, a single
tunnel) on the client for VPN or Native IP access. This would be the case
when connected devices are already configured using IP addresses from