I have CCTV that work via 3G (use simcard). I can access it directly using dynamic IP but as it keep changes, I won't be able to access it. My question if I set DDNS on CCTV, how can DDNS detect the current dynamic IP. Where do I port forward the DDNS host name as there is no router use. scenario like thisCCTV(3G simcard)  ------> 3G provider ------> user                  <------             <------   
How DDNS can link to 3G simcard dynamic IP
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