D-Link DSR-250N Product Manual - Page 142

Unified Services Router User Manual Figure 97: Firmware version information and upgrade option This router also supports an automated notification to determine if a newer firmware version is available for this router. By clicking the Check Now button in the notification section, the router will check a D-Link server to see if a newer firmware version for this router is available for download and update the Status field below.  IMPORTANT! After firmware 1.04B13, new user database architecture is introduced. The new user database is easier to setup and more intuitively to use. When users upgrade DSR's firmware to 1.04B13 or latter, DSR will automatically merge users in the old database into the new one. However, all user databases will be swept away when users downgrade firmware from 1.04B13 to the older one, e.g. 1.03B43. Please keep in mind: backup your user database for further restoring once you decide to downgrade firmware to the older one. 9.7 Dynamic DNS Setup Tools > Dynamic DNS Dynamic DNS (DDNS) is an Internet service that allows routers with varying public IP addresses to be located using Internet domain names. To use DDNS, you must setup an account with a DDNS provider such as DynDNS.org, D-Link DDNS, or Oray.net. Each configured WAN can have a different DDNS service if required. Once configured, the router will update DDNS services changes in the WAN IP address so that features that are dependent on accessing the router's WAN via FQDN will be 140