mirror of
https://github.com/searxng/searxng.git
synced 2024-11-09 06:30:10 +01:00
115 lines
4.1 KiB
ReStructuredText
115 lines
4.1 KiB
ReStructuredText
How to protect an instance
|
|
==========================
|
|
|
|
Searx depens on external search services. To avoid the abuse of these services it is advised to limit the number of requests processed by searx.
|
|
|
|
An application firewall, ``filtron`` solves exactly this problem. Information on how to install it can be found at the `project page of filtron <https://github.com/asciimoo/filtron>`__.
|
|
|
|
Sample configuration of filtron
|
|
-------------------------------
|
|
|
|
An example configuration can be find below. This configuration limits the access of
|
|
|
|
* scripts or applications (roboagent limit)
|
|
|
|
* webcrawlers (botlimit)
|
|
|
|
* IPs which send too many requests (IP limit)
|
|
|
|
* too many json, csv, etc. requests (rss/json limit)
|
|
|
|
* the same UserAgent of if too many requests (useragent limit)
|
|
|
|
|
|
.. code:: json
|
|
|
|
[
|
|
{
|
|
"name": "search request",
|
|
"filters": ["Param:q", "Path=^(/|/search)$"],
|
|
"interval": <time-interval-in-sec>,
|
|
"limit": <max-request-number-in-interval>,
|
|
"subrules": [
|
|
{
|
|
"name": "roboagent limit",
|
|
"interval": <time-interval-in-sec>,
|
|
"limit": <max-request-number-in-interval>,
|
|
"filters": ["Header:User-Agent=(curl|cURL|Wget|python-requests|Scrapy|FeedFetcher|Go-http-client)"],
|
|
"actions": [
|
|
{"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": "block",
|
|
"params": {"message": "Rate limit exceeded"}}
|
|
]
|
|
},
|
|
{
|
|
"name": "IP limit",
|
|
"interval": <time-interval-in-sec>,
|
|
"limit": <max-request-number-in-interval>,
|
|
"stop": true,
|
|
"aggregations": ["Header:X-Forwarded-For"],
|
|
"actions": [
|
|
{"name": "block",
|
|
"params": {"message": "Rate limit exceeded"}}
|
|
]
|
|
},
|
|
{
|
|
"name": "rss/json limit",
|
|
"interval": <time-interval-in-sec>,
|
|
"limit": <max-request-number-in-interval>,
|
|
"stop": true,
|
|
"filters": ["Param:format=(csv|json|rss)"],
|
|
"actions": [
|
|
{"name": "block",
|
|
"params": {"message": "Rate limit exceeded"}}
|
|
]
|
|
},
|
|
{
|
|
"name": "useragent limit",
|
|
"interval": <time-interval-in-sec>,
|
|
"limit": <max-request-number-in-interval>,
|
|
"aggregations": ["Header:User-Agent"],
|
|
"actions": [
|
|
{"name": "block",
|
|
"params": {"message": "Rate limit exceeded"}}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
]
|
|
|
|
|
|
|
|
Route request through filtron
|
|
-----------------------------
|
|
|
|
Filtron can be started using the following command:
|
|
|
|
.. code:: bash
|
|
|
|
$ filtron -rules rules.json
|
|
|
|
It listens on 127.0.0.1:4004 and forwards filtered requests to 127.0.0.1:8888 by default.
|
|
|
|
Use it along with ``nginx`` with the following example configuration.
|
|
|
|
.. code:: bash
|
|
|
|
location / {
|
|
proxy_set_header Host $http_host;
|
|
proxy_set_header X-Real-IP $remote_addr;
|
|
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
|
|
proxy_set_header X-Scheme $scheme;
|
|
proxy_pass http://127.0.0.1:4004/;
|
|
}
|
|
|
|
Requests are coming from port 4004 going through filtron and then forwarded to port 8888 where a searx is being run.
|