Register Your Nameservers
Step 1: Log in to our Client Area and navigate to Domains > My Domains >click the arrow to the right of the domain for which you want to add custom nameservers and select "Manage Domain".
Step 2: You will then be greeted by the normal domain overview page for that particular domain. On the left side of the page, you will notice a "Manage" block with a list of actions that you can perform on the domain, click on the "Private Nameservers" option.
Step 3: Within the Private Nameservers page locate the "Register a Nameserver Name" form. Simply add the sub-domain prefix you would prefer to use like "NS1" and the servers IP address that your domain is using within the form.
Click "Save Changes" and the new private nameserver will now be registered, do remember to register both nameservers. (ns1.yourdomain.com and ns2.yourdomain.com)
Once registered, you will now have to add the DNS records for the newly registered nameservers on the control panel, we have detailed the steps below as well.
Adding the new nameservers DNS in Direct Admin
Step 1: Log in to your Direct Admin account. (Login URL is found at https://s13.my-control-panel.com:2222)
Step 2: Navigate to the Account Manager section > DNS Management
Step 3: Click on the "Add Record Button"
Step 4: Fill in the form with all the nameservers details, including the servers IP and the nameserver itself. Make sure to have the Record Type set to "A".
Once you have added the needed details, click on the "Add" button and your DNS changes should now take effect. Make sure to do this with both your nameservers.
