Hello guys, 
Pls help me .  
I am using 3G USB dongle internet with Tplink 3g Router.  which is connected to Hikvision DVR(LAN PORT). 
  
  
* I can see live cameras on local network eg 192.168.1.199:81  
* I forwarded ports and DMZ in router. i checked @ yougetsignal.com ports are not forwarded successfully. 
* I checked internet ip address in tplink connection status and checked ip address  @ cmyip.com  both ip's different.  
* I used ip address to open hikvision dvr which shown in tplink connection status. eg 100.78.xx.xxx:81 hikvision dvr opened normally.  
( it seem like working like local network cuz it was very fast loading/buffering) 
  
ip address in tplink 100.78.xx.xxx 
ip address in cmyip.com 101.56.xxx.xx 
  
few months before i used same router and same 3G dongle for hikvision ddns online system. that time ports were successfully forwarded and i could see them online. ( web page/ivms client)