Hi dynadot_staff, I have the same problem as burdadi, I tried setting ns100.dynadot.com and ns101.dynadot.com as the Master and Slave DNS Server, respectively, on registro.br, However I'm getting a message claiming that the "domain is unknown", for ns100 and "refused search" for ns101
You can skip that part as it only applies to domains registered at Dynadot. Instead, you would set your name servers to ns100.dynadot.com and ns101.dynadot.com in your GoDaddy account.