{
  "port": 6969,
  "protocol": "both",
  "service": "BitTorrent tracker (IANA: acmsoda)",
  "oneLiner": "The customary BitTorrent tracker port — announce and scrape traffic from torrent clients.",
  "whatItIs": "IANA has 6969 registered as \"acmsoda\" on both TCP and UDP, a registration with no public protocol behind it. What actually runs there is BitTorrent tracker software: opentracker binds 0.0.0.0:6969 and [::1]:6969 with no configuration options given, and countless `http://tracker.example:6969/announce` and `udp://tracker.example:6969/announce` URLs in torrent files follow that convention. A tracker only brokers peer lists — it does not carry file content — so an open 6969 means someone is coordinating swarms, not serving data.",
  "exposure": {
    "verdict": "fine",
    "note": "Public trackers are public by design; the exposure question is policy and bandwidth (open trackers attract heavy unsolicited announce traffic), not confidentiality."
  },
  "checkCommand": "curl -sI http://TARGET:6969/announce",
  "links": [
    {
      "title": "opentracker — open and free BitTorrent tracker (binds 6969 by default)",
      "url": "https://erdgeist.org/arts/software/opentracker/",
      "kind": "official-docs"
    },
    {
      "title": "IANA Service Name and Transport Protocol Port Number Registry — 6969",
      "url": "https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=6969",
      "kind": "iana"
    }
  ]
}