{
  "server": "hub.example.com:25565",
  "psk": "change-me-to-a-long-random-passphrase",
  "maxConn": 4,
  "pingIntervalMs": 20000,
  "streamWindowBytes": 262144,
  "mappings": [
    {
      "pattern": "mc\\.example\\.com",
      "destination": "127.0.0.1:25566",
      "proxyProtocol": true
    }
  ]
}