{
  "date": "2026-10-02",
  "provenance": "Sanitized observations from the preceding main-thread diagnostic; not a new live run during textbook assembly",
  "environment": "webrtc-komaroff.gis-master.ru",
  "dns": {
    "host": "stun.gis-master.ru",
    "A": [
      "178.20.41.87"
    ],
    "AAAA": [],
    "AAAA_rcode": "NOERROR"
  },
  "stun_binding": {
    "transport": "UDP",
    "port": 3478,
    "request_bytes": 20,
    "response_bytes": 40,
    "response_type": "0x0101",
    "transaction_validated": true,
    "xor_mapped_decoded": true,
    "elapsed_ms": [
      77,
      83.9
    ],
    "software": null
  },
  "browser_hostname_gather": {
    "error_code": 701,
    "error": "STUN host lookup received error.",
    "error_local_address_family": "IPv6",
    "successful_ipv4_srflx": 2
  },
  "browser_literal_counterfactual": {
    "synthetic_silence": true,
    "actual_microphone_captured": false,
    "error_codes": [],
    "successful_ipv4_srflx": 2,
    "ice_checks_sent_range": [
      20,
      21
    ],
    "ice_check_responses": 0,
    "nominated_pair": false,
    "dtls_state": "new",
    "transport_bytes_sent": 0,
    "transport_bytes_received": 0
  },
  "live": {
    "signaling_http_status": 200,
    "events_connected": true,
    "positive_rtp_delivery_confirmed": false,
    "frontend_asset": "/assets/index-K_8EaX4G.js",
    "core_candidates": {
      "type": "host",
      "addresses": [
        "10.200.0.140",
        "10.0.14.22",
        "172.18.0.48"
      ],
      "ports": "dynamic"
    }
  },
  "source": {
    "core_ice_servers": [],
    "drs_udp_target": 19303,
    "drs_udp_published": 19303,
    "diagnostic_commits": [
      "2e5aa37f0eaf9931bfc5d0b8e10915ba63ac3b0c",
      "e29be7f63037f66cbb140aec999f4a00d069dab5"
    ]
  },
  "delivery": {
    "pipeline": 4834,
    "checks_and_build": "success",
    "deploy_job": 9454,
    "deploy_status": "manual, not executed in that check",
    "runtime_digest_verified": false
  },
  "history": [
    {
      "date": "2025-10-14",
      "commit": "37bc519678478fd58d1049e2fe9da5cdf4b41d1a",
      "meaning": "Client configuration contains GIS STUN hostname"
    },
    {
      "date": "2025-10-21",
      "commit": "73e18c223b83a01667eb50de2dde9c06136952f6",
      "meaning": "Legacy server aiortc path switched back to GIS STUN"
    },
    {
      "date": "2025-12-10",
      "commit": "8ce1f17b5ceb4b0ad0c3867fbd01abc7d56fdaf3",
      "meaning": "New Core handler added with empty iceServers; source date, not deployment date"
    }
  ],
  "conclusions": [
    {
      "status": "RUNTIME",
      "claim": "STUN Binding worked over IPv4 in the named checks"
    },
    {
      "status": "RUNTIME",
      "claim": "Removing 701 did not restore tested browser-to-Core ICE paths"
    },
    {
      "status": "INFERRED",
      "claim": "Primary observed failure lies in media ICE/UDP reachability, not a general STUN outage"
    },
    {
      "status": "UNKNOWN",
      "claim": "Exact NAT/firewall hop, applied mapping, runtime image, STUN process/vendor and owner"
    }
  ],
  "excluded": "tokens, cookies, auth headers, full SDP, ICE passwords, mapped client address, real audio, personal transcripts and raw private logs"
}