User manual

Configuring your RLXIC-EV RLXIC-EV ♦ Intelligent Cellular
User Manual RadioLinx® Intelligent Cellular Ethernet Gateway for Verizon
ProSoft Technology, Inc. Page 71 of 104
March 10, 2010
5.10.2 Dynamic DNS
Dynamic DNS allows a RLXIC-EV WAN IP address to be published to a
proprietary ProSoft Technology dynamic DNS service called IP Manager.
If you have a fleet of RadioLinx Intelligent Cellular devices or even if you only
have one, it can be difficult to keep track of the current IP addresses, especially if
the addresses are not static but change every time the devices connect to the
cellular network. If you need to connect to a gateway, or the device behind it, it is
so much easier when you have a domain name (car54.mydomain.com, where
are you?).
Reasons to contact the device and/or the connected device:
 Requesting a location update from a delivery truck.
 Contacting a surveillance camera to download logs or survey a specific area.
 An oil derrick that needs to be triggered to begin pumping.
 Sending text to be displayed by a road sign.
 Updating the songs to be played on a juke box.
 Updating advertisements to be displayed in a cab.
 Remote access to a computer, a PLC, an RTU, or other system.
 Monitoring and troubleshooting the status of the device itself without needing
to bring it in or go out to it.
A dynamic IP address is suitable for many Internet activities such as web
browsing, looking up data on another computer system, data only being sent out,
or data only being received after an initial request (also called Mobile Originated).
However, if you need to contact the RLXIC-EV directly, a device connected to the
RLXIC-EV, or a host system using your RLXIC-EV (also called Mobile
Terminated), a dynamic IP will not give you a reliable address to contact (since it
may have changed since the last time it was assigned).
Domain names are often only connected to static IP addresses because of the
way most domain name (DNS) servers are set-up. Dynamic DNS servers require
notification of IP Address changes so they can update their DNS records and link
a dynamic IP address to the correct name.
 Dynamic IP addresses are granted only when your RLXIC-EV is connected
and can change each time the gateway reconnects to the network.
 Static IP addresses are granted the same address every time your RLXIC-EV
is connected and are not in use when your gateway is not connected.