Why are there 2 passwords, a Master Password and a DNS Password ?
When you create a new domain name, you are asked to supply both a Master Password and a DNS Password. They protect different kinds of information. With the Master Password you can change all of your customer information, including the passwords. If you only know the DNS Password, you can only change the DNS nameserver information for your domain name. You can give the DNS password to your ISP or technical staff, and they can set up the technical details of your nameservers. Be sure to remember both of your passwords.