1. Login to the Host Monster control panel at the top right of the Host Monster home page.
2. Once logged in, scroll down and find the domains section of your control panel. Click on the DNS Zone Editor.
3. Check to make sure you have the correct domain selected under the Select a Domain menu.
4. Under the Add DNS Record area fill out the boxes with the following information:
Host Record: m
Points to: mobile.dudasite.com
6. Click 'Add Record.' Thats it! You've now setup your custom subdomain.