Network Development Practice

Building a self-hosted P2P signaling and relay server is the core infrastructure for cross-network connectivity, remote access, and mesh VPN scenarios. This article systematically surveys the complete technology landscape across three dimensions: protocol standards (STUN/TURN/ICE/BEHAVE), mainstream products (Tailscale, Nebula, NetBird, ZeroTier, Headscale, OpenZiti, etc.), and frameworks & algorithms (libp2p, WebRTC, Kademlia DHT).

All technical descriptions are verified against primary sources—RFC originals, academic papers, and official documentation. Key statistics include citations.

How do NVR (Network Video Recorder) systems let mobile apps view surveillance feeds from any network? This is a core requirement for the security industry and smart home ecosystems. This article systematically surveys three dimensions: open-source NVR projects (Frigate, go2rtc, Kerberos.io, Agent DVR, etc.), commercial surveillance vendors (Hikvision, Dahua, EZVIZ, Ubiquiti, Synology, Reolink, etc.), and third-party P2P platforms and security research (TUTK Kalay, iLnkP2P/PPPP, GB/T 28181, key CVEs).

All technical descriptions are verified against primary sources—official documentation, security advisories, and academic papers. Key statistics include citations.