DDNS unix device in 10.x network

My Internet provider uses NAT network to connect users. So, when I connect to the Internet, I got an 10.x.x.x IP address. Is there any way to access Unix device in such type of network? DDNS needs an external IP to get work, and I can't get it, even if I want. Any ideas? **EDIT**: And of course, the best solution is to get constant connection to the device.