I'm struggling for two days and I can't find solution for my problem. Can somebody help? On my DVR network I put this settings like on image: 
  
 
  
I set up port forwading on my TP-Link router. Canyouseeme said that all this ports are open. And then when I enter in in my browser ip e.g. 192.168.1.102:8080 browser open dvr client. Then I put evry information like on this image: 
  
 
  
Everytime client faild to login. 
  
The most stupid thing is that everything was working well and suddenly my dvr stopped to connect. Does somebody know what is the problem?