Here is a short guide about how to connect your own domain to your Minecraft-server:
Log in into your webinterface and choose your domain at the taskbar on the right. Click on DNS-Settings. Click on the button “ + new SRV entry“. Now you choose Minecraft as your service. Fill in the following fields:Subdomain: You can either fill in your subdomain or keep the field empty. – If you fill in nothing you can connect your domain without any prefixed subdomain. IP: Enter the address (domain or IP) of your Minecraft server. Without port. Target-port: Enter the Port of the Minecraft-server. Default: 25565Now save your form.
Connect a domain to Minecraft