NS Records
Step 1: Go to Dyn & login to your account
Step 2: Click Overview within the Managed DNS application.
Step 3: Scroll to the Customer Account Info section of the Overview page.
Step 4: Select Edit on the External Nameservers line.
Step 5: Enter the NS Record based on the information provided in the Datahash set-up window. Click on Save Defaults. Repeat for all 4 NS records provided by datahash.
CNAME Records
Step 1: Go to Dyn & Log in to your Dyn account and find the My Services option
.
Step 2: Find the Zone you wish to add a record to and click Dyn Standard DNS Service to the right of the zone’s name.
Step 3: Click on Add Alias(CNAME)
Step 4: Copy the CNAME record value shared by datahash and paste the same in the domain manager. Click on Create Record