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

[
    {
        "name": "api limit",
        "interval": 60,
        "limit": 1000,
        "filters": ["Path=^/api"],
        "aggregations": ["Path"],
        "actions": [
            {"name": "block"}
        ],
        "subrules": [
            {
                "name": "drop put",
                "interval": 60,
                "limit": 100,
                "filters": ["Method=PUT"],
                "aggregations": ["Header:X-Forwarded-For"],
                "actions": [
                    {"name": "shell",
                     "params": {"cmd": "iptables -A INPUT -s %v -j DROP", "args": ["Header:X-Forwarded-For"]}}
                ]
            }
        ]
    },
    {
        "name": "log'n'block rss",
        "interval": 300,
        "limit": 2500,
        "filters": ["Path=^/$", "GET:format=rss"],
        "actions": [
            {"name": "log"},
            {"name": "block"}
        ]
    },
    {
        "name": "log rule",
        "filters": ["Path=/"],
        "actions": [ {"name": "log"} ],
        "subrules": [
            {
                "name": "block missing accept-language",
                "filters": ["!Header:Accept-Language"],
                "actions": [
                    {"name": "block"}
                ]
            },
            {
                "name": "block curl",
                "filters": ["Header:User-Agent=[Cc]url"],
                "actions": [
                    {"name": "block"}
                ]
            }
        ]
    }
]