I have read here: http://www.tumblr.com/docs/en/custom_domains all the steps. I am missing the first.
First, you'll need to buy a domain from a registrar like Namecheap, pairNIC, Register, or iWantMyName. This usually costs $10-$40 per year. Then, you need to make a configuration change with your registrar:
If you are using a subdomain that has three or more levels, like http://www.mywebsite.com or blog.mywebsite.com, follow the registrar's instructions to point the CNAME record for the subdomain to domains.tumblr.com.
If you are using a domain that has only two levels, like mywebsite.com, follow the registrar's instructions to point the domain's A-record (IP address) to 188.8.131.52.
You only need to make one of the changes above depending on whether you are using a subdomain or a domain with your blog. You do not need to make both changes.
Do I have to go under
"> My Account > Manage Domains > Modify Domain"
"ENTER YOUR CUSTOM DOMAIN NAME SERVER INFORMATION"?
It prompts me:
You are currently using our domain name servers (DNS) for your domain.
You can change it and start using your own name servers or name servers of someone
else like your webhost. This step is sometimes known as 'transferring the
domain' by some webhosts. Please note that using custom nameservers will
disable some of our free features like e-mail forwarding, url forwarding etc.,
as these functionalities depend on our nameservers.
Please enter DNS name only (ex: ns1.mydomain.com). Please don't enter IP
addresses. You can enter up to five name servers. It is advisable to enter atleast
two nameservers for a domain. Please note that it will take up to 24 hours for
the changes to take effect.
Please note that if you are setting up DNS servers for .eu or .ca domains,
use the IPAddress--dns.name format (ex: 184.108.40.206--ns1.domain.com)
What should I do exactly?
Thank you all,