In this scenario (Figure 3), the JACE is Ethernet-connected directly to a cable or DSL modem, and its DDNS configuration is as mode “Internet,” associated with its onboard Ethernet adapter.

The cable or DSL ISP provides a dynamically-assigned IP address to the JACE. The JACE’s TCP/IP configuration for this port is enabled for DHCP, in order to use this IP address. Through its DDNS configuration, the JACE sends its IP address to the DDNS provider (TZO), where it is registered for dynamic DNS. This occurs upon any change in the ISP-assigned IP address. The JACE remains reachable at its DDNS “domain name” through any Internet connection, for example, “myjace.tzo.com.”