There are 2 things required:

1. Finding the public IP address;

2. Notifying that address to the remote client(s).


1. With DynDNS, how will my client know and acquire the dynamic address of the hardware?

2. If the device address is not public, then will DynDNS work?

Generally, we use a UDP relay socket on a public IP to handle changing IPs. This works fine even if the machines are private, behind a public router. If some service can do this thing, it would be great!!