What is Dynamic DNS (DDNS), and how do I set it up at IU?
Dynamic DNS (DDNS) is an addition to the DNS standard. Dynamic DNS updates a DNS server with new or changed records for IP addresses without the need for human intervention. This allows a fully qualified domain name (FQDN) that never changes to be associated with a dynamically assigned IP address that can change quite often.
For example, suppose you want to name your computer
DarthVader.ads.iu.edu but are required to use
DHCP. Even if you enter
DarthVader in the
"Computer Name" field of your computer properties, DNS servers
anywhere would know you only by the FQDN associated with the IP
address you're assigned. At Indiana University, if DHCP gives you an
IP address of
18.104.22.168, your computer's Internet name
would not be
156-56-0-1.dhcp-bl.indiana.edu. However, if you use DDNS,
your computer's IP address will be properly associated with
At IU, DDNS works for Windows 8.x, 7, Vista, and the server versions of each (2008, 2003, 2003). It will not work for the Home editions of Windows 8.x, 7, Vista, or non-Windows operating systems, such as Mac OS X, Linux, or BSD. If your operating system is not supported, or if you cannot join the ADS domain, you can use a third-party DDNS service, such as Dynamic Network Services, Inc. or PlanetDNS. For a comprehensive list of DDNS providers, see DNS Lookup's Dynamic DNS Providers List. UITS does not recommend or endorse any third-party DDNS service.
Although DDNS is an official addition to the DNS standard, not all ISPs refresh their own DNS servers' data often enough to reflect daily changes, so some users may still run into trouble accessing your DDNS-configured FQDN. This is not the fault of your DDNS service provider, but a problem caused by the ISP not updating its DNS tables quickly enough.
To set up your Windows computer to use Indiana University's DDNS service, follow these steps while logged in as an administrator:
Note: At Indiana University, the University Information Security Office (UISO) recommends that you normally refrain from running your Windows computer as an administrator. For more, see What is the principle of least privilege?
- From the
Network and Sharing Center. menu, click . In Windows
8.x, from the menu, search for
- From the toolbar of the window that opens, click .
- On the left, click (in Windows 8.x and 7) or (in Vista).
- Right-click , and click .
- Select , and click .
- Click .
- Click the
ads.iu.edu. tab. Next to "DNS suffix for this
- Check .
- Check .
- Click , then again, and then .
Now your computer will dynamically register itself with the IU DDNS servers.
This is document akir in the Knowledge Base.
Last modified on 2014-06-25.
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