It is going to be difficult to connect to a device that regularly changes it's IP. This is what DynDNS, No-IP, and other similar services are used for. To resolve the IP address of your dynamic IP device. Otherwise, is it possible? Yes, if the dynamic IP is public and you know what that IP address is at the exact moment in time that you attempt to make the connection. You should register the device in Digi Remote Manager to find out what your device IP is when you need to access it.