the two configuration files from the provisioning server via FTP/TFTP / HTTP on system startup;
Default is disabled.
DDNS
Dynamic DNS is a service, that provides you with a valid, unchanging, internet domain name (an URL) to
go with that (possibly ever changing) IP-address.
The DDNS (Dynamic DNS) service allows you to alias a dynamic IP address to a static hostname,
allowing your computer to be more easily accessed from various locations on the Internet.
Without DDNS, the users should use the WAN IP to reach internal server. It is inconvenient for the users
if this IP is dynamic. With DDNS supported, you apply a DNS name (e.g., www.R7121-L1.com) for your
server (e.g., Web server) from a DDNS server. The outside users can always access the web server using
the www.ata.com regardless of the WAN IP.
When you want your internal server to be accessed by using DNS name rather than using the dynamic
IP address, you can use the DDNS service. The DDNS server allows to alias a dynamic IP address to a static
hostname.
Unlike DNS that only works with static IP addresses, DDNS works with dynamic IP addresses, such as
those assigned by an ISP or other DHCP server. DDNS is popular with home networkers, who typically
receive dynamic, frequently-changing IP addresses from their service provider.
DDNS is a method of keeping a domain name linked to a changing (dynamic) IP address. With most
Cable and DSL connections, you are assigned a dynamic IP address and that address is used only for the
duration of that specific connection. With the R7121-L1, you can setup your DDNS service and the ATA
will automatically update your DDNS server every time it receives a different IP address.
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