{
  "port": 4662,
  "protocol": "tcp",
  "service": "eDonkey2000 / eMule",
  "oneLiner": "The classic eDonkey file-sharing port — eMule and aMule clients listening for incoming peers.",
  "whatItIs": "4662 TCP, paired with 4672 UDP, was the default listening port of eDonkey2000 and then eMule, the peer-to-peer file-sharing clients that dominated European file sharing in the early 2000s. eMule's own FAQ notes that versions from 0.47c onward pick random ports at first start precisely because the fixed defaults were so widely blocked and fingerprinted, so a modern client may be anywhere. IANA registers the port to an unrelated service, OrbitNet Message Service. Scanners and ISPs alike have treated 4662 as a P2P signature for two decades.",
  "exposure": {
    "verdict": "careful",
    "note": "Inbound connections are how the protocol works, so an open port is not itself a misconfiguration — but it advertises P2P participation to anyone scanning and exposes a legacy, lightly maintained client to the internet."
  },
  "checkCommand": "nc -vz -w 3 TARGET 4662",
  "links": [
    {
      "title": "eMule FAQ — default ports 4662 TCP / 4672 UDP and their randomisation",
      "url": "https://www.emule-project.com/home/perl/help.cgi?l=1&rm=show_topic&topic_id=122",
      "kind": "official-docs"
    },
    {
      "title": "IANA port registry — 4662 (oms)",
      "url": "https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=4662",
      "kind": "iana"
    }
  ]
}