Difficulty defining values DNS Or nameserver

Hello dear managers and friends about setting DNS or nameserver I had a question with Dreamy Image in Dreambox. I wanted to know if the IP address on my modem was 192.168.1.1 and DNS ISP I'm 170.150.150.150 and 170.155.155.155 and Gateway 192.168.1.1 and Subnet mask 255.255.255.0 Now in part name server or DNS What values do I need to import in Image and Dream to get high quality Internet with no problems For example if I nameserver1 Make 192.168.1.1 And nameserver2 Make 170.150.150.150 And nameserver3 Make 170.155.155.155 Whether it's appropriate or not nameserver1 Make 170.150.150.150 and nameserver2 Make 170.155.155.155 To put. I am waiting for your response . Thank you

Hi again dear friend i wanted to see if i needed the values 192.168.1.1 Make that as IP Same as modem input nameserver1 In Dream and Image. Does this make the connection to the modem more stable and thus better quality of Internet use? Or not the same two DNS That ISP It is enough to insert the data into the dream and image. Thank you