Cyclades AlterPath OnBoard, Administrator'S Manual

Page: 289 / 460

Web Manager "Network" Menu Options 253
Configuring Private Subnets and Virtual Networks
The example in Figure 7-17 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 7-17: Network
→
Private Subnets: Add Subnet Dialog
The example in Figure 7-17 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 must also define a virtual network based on Destination
Network Address Translation (DNAT) in the following cases:
• When multiple subnets must be supported (as when connected devices are
already configured using IP addresses from multiple address ranges and it
is not feasible to change the already-defined device IP addresses)
• When one or more subnets is defined, and it is important to hide the
addresses of the connected devices from users by the use of
virtual IP
addresses