Nat Devices - Avocent Network Device SPC420 Installer/User Manual

NAT Devices

NAT devices enable a company to use more internal IP addresses than they have assigned to
managed appliances. The IP addresses are not exposed outside of the NAT device.
NAT devices are typically used with a DSL broadband router. A DSView 3 software client is
connected to the NAT device, as shown in Figure 1.6, which then connects to the corporate network
using a VPN.
Figure 4.3: Single NAT Configuration (Client Only)
Table 4.6: Single NAT Configuration (Client Only) Descriptions
Number Description
1 DSView 3 Software Client
2 Private
3 NAT Device
4 Client
5 Public
6 VPN
Another scenario, shown in Figure 4.4 on page 54, is when the corporate site also uses a NAT
device to save IP addresses (double-NAT). Since the DSView 3 software client is trying to access a
private resource inside the corporate site, the TCP/IP ports used for HTTPS and the proxy server
must be configured to be exposed on the corporate NAT device.
Chapter 4: Basic Operations
Number Description
7 Firewall
8 Private
9 DSView 3 Server
10 Managed Appliance
11 Corporate
53