How to set up your NameCheap Domain DNS
Login to your NameCheap Account, locate your domain to edit. Once your have completed this, click on the "All Host Records" link from the menu on the left.
How to configure your root domain
URL Forwarding Method (recommended)
Edit the "@" Host name IP Addess URL to have value of http://www.mystoredomain1.com/ with a record type of "URL Redirect"
A Record Mapping
Edit the "@" Host name IP Addess URL to have value of 18.104.22.168 with a record type of "A Record"
How to configure your sub domain
Create or edit the subdomain you want to use. Enter your existing store domain (ex: yourstore.highwire.com) and use the CNAME (Alias) Record Type.
How to add a custom domain to Highwire
To add your custom domain, log in to your dashboard and go to Settings>Domain Hosting. If you have an existing domain, click the button ‘Add Existing Domain’. If you have not registered a custom domain but would like to register one, this can be done by clicking the button ‘Register New Domain’.