Although each {ANYNODE} functions independently as a fully self-contained universal computing unit, many scenarios—such as edge deployments, hybrid environments, or distributed computing setups—require seamless communication between {ANYNODE}s. To enable this, we offer the Sky Link service, also known as the Global Private Network (GPN), a core feature of the built-in Sky Router system. Sky Link establishes secure, point-to-point encrypted tunnels between {ANYNODE}s, regardless of their physical location. Unlike traditional methods that extend networks across entire clusters, Sky Link routes all inter-node traffic exclusively through these encrypted tunnels. This approach ensures strong security and provides precise control over which nodes join the private network—minimizing exposure and simplifying policy enforcement.