{
  "description": "Incoming SSH (tcp/222)",
  
  "service": {
    "ssh-alt": { "proto": "tcp", "port": 222 }
  },

  "filter": [
    {
      "in": "internet",
      "out": "_fw",
      "service": "ssh-alt",
      "action": "accept",
      "conn-limit": { "count": 3, "interval": 10 }
    }
  ]
}