DDNSNotify is a program that logs into a (telnet-enabled) router and retrieves the WAN IP address, but only if the IP address differs from the DNS (A record) address for the domain name given.
It is intend for DynamicDNS applications, where the IP address for a Web site changes (usually due to ISP rules). Thus, using the new IP address, you can update your DNS records using another external script (such as zoneclient.py), so that your Web site's downtime is reduced to a minimum.
The project currently supports Draytek Vigor routers (and possibly other Draytek models).
· Java Environment