Probing server-side headers and client-side WebRTC / STUN behaviour.
Connection
🌐 Server-seen IP
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🛰️ ISP / ASN
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📍 Location
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⚡ Edge / Link
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Client-side (WebRTC / STUN)
🏠 Local (LAN) IP
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private address behind NAT
🔭 WebRTC Public IP
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server-reflexive via STUN
🧩 NAT Layers (X-Forwarded-For chain)
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Precision Probe (RFC 3489 UDP echo)
Exact Full / Restricted / Port-Restricted / Symmetric
Browsers cannot observe unsolicited inbound UDP, so Cone subtypes can't be
separated here. Run the companion probe on a host behind your NAT; it performs
the real STUN matrix (CHANGE-REQUEST) and reports back.