This feature is to be used if you want to provide DNS service for other Domains. If you do not have dns sofware running on this host/ip you probably do not want to use this feature. If you rename the nameserver hostname to a different base domain, you will have to manage the new domain's profile in order to make additonal changes to the nameserver. For example: changing ns1.bar.com would require you to login to bar.com's profile to manage the nameserver after you make your changes Once you have created your name servers, if you wish to use them on your domain, you must manually add them through the main "Name Servers" section.