Specifications

Niagara Release 2.3
Revised: May 22, 2002 Niagara Networking & Connectivity Guide
Chapter 5 Connecting to an ISP
Configuring DDNS on the JACE-4/5
5–24
Figure 5-7 ddns.properties file opened and in the process of being edited.
Step 4 Edit the ddns.properties file using the information in Table 5-3.
Step 5 From the file menu, choose File > Close.
If you made any changes, you are prompted to save them, otherwise the window
closes.
Step 6 If prompted to save your changes, click one of the following:
• Yes to save your changes. The file saves and the window closes.
• No to discard your changes. The window closes.
• Cancel to return to the editing window, then refer to .
Step 7 Reboot the JACE.
Assuming that RAS has been set up and tested on the JACE, the JACE automatically
connects to the ISP and updates the DDNS server with its IP address. You can
connect to the JACE using the domain name specified in the ddns.properties file.
Troubleshooting DDNS Connections
As with troubleshooting captive ISP connections, troubleshooting DDNS
connections requires a connection to the JACE via local LAN (over an IP connection)
or by a serial connection. Errors in the DDNS update process are logged to the
JACE-4/5 event log. The event log also contains the dynamic IP address assigned to
the JACE upon reconnection to the ISP. You can access the event log via the Admin
Tool (Host > View Event Log) or via a browser at
http://<host name or IP
address>:3011/system/eventLog
.
Figure 5-8 shows DDNS errors in the event log, as viewed via browser. The JACE
cannot resolve the name of the TZO update servers when connected to the ISP. The
problem was misconfigured DNS servers in the network settings of the JACE.