Echelon IP-852 Channel - Manual (Page 51)

IP-852 Channel User’s Guide 43
When using DDNS, each time a new DHCP lease is given (for example, each time the
computer’s IP address changes) the DDNS server is notified. The DDNS server keeps
track of each client’s current address. To let external users see the Web server in your
LAN, instead of telling the registrar that www.mylan.com is linked to 131.23.203.17,
you tell the registrar that www.mylan.com is linked to mylan.ddns.org (for example).
When an Internet user types in www.myhouse.com, the Internet DNS server forwards
the request to mylan.ddns.org, which forwards the request to the current IP address of
your home.
The DDNS provider tracks any changes in your computer’s address and forwards any
request for mylan.ddns.org to your house’s current IP address.
Because of its potential complications and its reliance on relatively small third
party providers, IP-852 channels configured to use devices with DDNS will
typically not be as reliable as IP-852 channels configured with devices using
static IP addresses.