A.goto www.dynu.com register a DDNS
B.goto Controlpanel
C.select DDNS Services
D.ADD
E.set your domain and ip
F.now you can use this module
G.exmple:dynu_ip('http://api.dynu.com/nic/update','example.dynu.com/your domain','username','password','delay(ms)/ex:5000',true/false)'
Example:
var dynu_ip = require('dynu-ip');
dynu_ip('http://api.dynu.com/nic/update','maxmilad.kozow.com','username','123456','5000',true);