Defined Networking, Inc. is a software publisher focused on secure networking solutions built around Nebula, the open-source overlay networking technology originally developed at Slack. The company specializes in managed Nebula networks, providing tools that simplify the deployment and operation of encrypted, peer-to-peer virtual networks across distributed infrastructure. Its product range centers on the DNClient family, which serves as the client-side software for connecting devices to managed Nebula environments. DNClient Desktop is a desktop client designed for end-user workstations, giving individuals a straightforward way to join and authenticate with managed overlay networks from their personal computers. DNClient Server, by contrast, is a headless daemon intended for servers and other unattended systems, enabling machines without a graphical interface to maintain persistent, secure connectivity within the same managed network fabric. Together, these packages address common use cases in modern infrastructure management, such as connecting remote employees to internal resources, linking cloud instances and on-premises servers into a unified private network, and replacing or complementing traditional VPN setups with a lightweight, certificate-based overlay. Typical customers include system administrators, DevOps teams, and organizations that need encrypted host-to-host communication across heterogeneous environments without complex firewall rules or centralized traffic bottlenecks. By offering both an interactive desktop application and a background service variant, Defined Networking covers the two principal device categories found in most fleets, allowing operators to manage user endpoints and backend infrastructure under a consistent networking model with centralized oversight.