You can configure a custom domain with a FusionAuth Hosting package or using AWS CloudFront, offering flexibility and control over authentication management. To set up an AWS CloudFront distribution for a custom domain, you need to obtain an SSL certificate from AWS Certificate Manager, create a CNAME DNS entry with your domain provider, and then set up the CloudFront distribution. Once complete, you can configure the DNS to point to the distribution when a user enters the custom domain, allowing secure access to your FusionAuth instance. With this setup, you can use the custom domain as you would the original URL, working seamlessly with applications and APIs.