Unverified50% confidenceFactExact time
NAT-PMP及其继任者PCP（Port Control Protocol，RFC 6887）试图以轻量化协议替代UPnP并引入基本访问控制机制，但至今尚未普及
1
Sources
50%
Confidence
Long-term
Relevance
7/16/2026
First Seen
Sources
Related Claims
UnverifiedP2P VPNs typically address NAT traversal issues through UDP hole punching and STUN/TURN protocols.71% similarUnverifiedNPM's management backend uses port 81 by default and should not be exposed to the public internet.71% similarUnverified局域网直连方案通常采用 mDNS 或 SSDP 协议实现零配置设备发现，数据传输层可选 WebSocket 或自定义 TCP 协议69% similarUnverifiedWebRTC使用UDP协议，而大多数VPN默认只路由TCP流量，导致UDP请求绕过VPN隧道暴露真实IP68% similar
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