The following guide will walk you through updating the origin IP in the MaxCDN portal, so the CDN knows where your server is located to request the assets.
MaxCDN no longer requires a static Origin IP Address. All Origin URL IPs are dynamically resolved unless you specifically assign IP address you wish to be treated as the Origin IP. You can accomplish this by enabling the Origin IP Resolution option from within zone settings, typing in your preferred Origin IP, and clicking the Update button to save your settings.
Origin IP Resolution Enabled - Scheme 
Origin IP Resolution Disabled - Scheme 
As always, If you have any questions or concerns about any of the topics mentioned in this article, please feel free to reach out to support - we are available 24/7 by chat or email.