DigitalOcean has introduced Cloud Firewalls, a free service designed to simplify the process of securing Droplets with easily configurable security rules. This service allows developers to define access rules and apply them to all Droplets from a central location, without consuming resources from their Droplets. The principle of least privilege is enforced, where only explicitly defined ports and IPs are accessible, and unauthorized traffic is dropped before reaching the Droplet. Cloud Firewalls can be easily configured using tags, Load Balancers, IP ranges, and individual Droplet names, and also supports multiple Firewalls per Droplet for finer-grained control. The service also offers a command line interface and RESTful API for automation, with plans to integrate it further with other tools. This feature is designed to make security easier to manage at scale, particularly for distributed applications with large numbers of resources.