searxng/utils/templates/etc/filtron/rules.json

[
  { "name": "suspiciously frequent IP",
    "filters": [],
    "interval": 600,
    "limit": 30,
    "aggregations": [
      "Header:X-Forwarded-For"
    ],
    "actions":[
      {"name":"log"}
    ]
  },
  { "name": "search request",
    "filters": [
      "Param:q",
      "Path=^(/|/search)$"
    ],
    "interval": 61,
    "limit": 999,
    "subrules": [
      {
        "name": "roboagent limit",
        "interval": 61,
        "limit": 1,
        "filters": [
          "Header:User-Agent=(curl|cURL|Wget|python-requests|Scrapy|FeedFetcher|Go-http-client)"
        ],
        "actions": [
          { "name": "log"},
          { "name": "block",
            "params": {
              "message": "Rate limit exceeded"
            }
          }
        ]
      },
      {
        "name": "botlimit",
        "limit": 0,
        "stop": true,
        "filters": [
          "Header:User-Agent=(Googlebot|bingbot|Baiduspider|yacybot|YandexMobileBot|YandexBot|Yahoo! Slurp|MJ12bot|AhrefsBot|archive.org_bot|msnbot|MJ12bot|SeznamBot|linkdexbot|Netvibes|SMTBot|zgrab|James BOT)"
        ],
        "actions": [
          { "name": "log"},
          { "name": "block",
            "params": {
              "message": "Rate limit exceeded"
            }
          }
        ]
      },
      {
        "name": "IP limit",
        "interval": 61,
        "limit": 9,
        "stop": true,
        "aggregations": [
          "Header:X-Forwarded-For"
        ],
        "actions": [
          { "name": "log"},
          { "name": "block",
            "params": {
              "message": "Rate limit exceeded"
            }
          }
        ]
      },
      {
        "name": "rss/json limit",
        "interval": 121,
        "limit": 2,
        "stop": true,
        "filters": [
          "Param:format=(csv|json|rss)"
        ],
        "actions": [
          { "name": "log"},
          { "name": "block",
            "params": {
              "message": "Rate limit exceeded"
            }
          }
        ]
      },
      {
        "name": "useragent limit",
        "interval": 61,
        "limit": 199,
        "aggregations": [
          "Header:User-Agent"
        ],
        "actions": [
          { "name": "log"},
          { "name": "block",
            "params": {
              "message": "Rate limit exceeded"
            }
          }
        ]
      }
    ]
  }
]