Topic:Steps of Domain Buy/Activation
There are a few steps that you should do to buy & and activate your domain in your server:
1- Buy domain in a registrer
2- Install your ehcp into your server (if not already done)
3- Set nameserver of your domain in your registrar (redirection from registrar to your dns)
4- Setup your domain in Ehcp
5- Put your files in your server/ftp. Without these, you will see an empty/under construction page.
You can find info in below links: