Unverified50% confidenceFactExact time
Tailscale first attempts to establish a direct UDP connection (via NAT traversal) and automatically falls back to DERP relay servers when a direct connection fails.
1
Sources
50%
Confidence
Long-term
Relevance
9/11/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedTailscale handles NAT traversal through DERP (Designated Encrypted Relay for Packets) servers, enabling devices on different networks to seamlessly form a unified network.80% similarUnverifiedTailscale uses DERP servers as fallback relays and preferentially attempts NAT traversal via the STUN protocol; its engineering blog documents achieving a direct-connection success rate of over 93%.78% similarVerifiedTailscale uses a combination of STUN-like protocols to detect public network addresses and UDP hole punching for NAT traversal, employing a strategy of attempting direct connection first and falling back to relay.76% similarUnverifiedTailscale在大多数NAT环境下无需UPnP即可完成直连72% similarUnverified对称型NAT对每个目标地址使用不同端口映射，UDP打洞成功率极低，几乎必须依赖中继72% similar
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