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To intercept bots that get their IPs from a range of IPs, there is a
``SUSPICIOUS_IP_WINDOW``. In this window the suspicious IPs are stored for a
longer time. IPs stored in this sliding window have a maximum of
``SUSPICIOUS_IP_MAX`` accesses before they are blocked. As soon as the IP makes
a request that is not suspicious, the sliding window for this IP is droped.
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
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To activate the ``link_token`` method in the ``ip_limit`` method add the
following to your ``/etc/searxng/limiter.toml``::
[botdetection.ip_limit]
link_token = true
Related: https://github.com/searxng/searxng/pull/2357#issuecomment-1554116941
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
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Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
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In order to be able to meet the outstanding requirements, the implementation is
modularized and supplemented with documentation.
This patch does not contain functional change, except it fixes issue #2455
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Aktivate limiter in the settings.yml and simulate a bot request by::
curl -H 'Accept-Language: de-DE,en-US;q=0.7,en;q=0.3' \
-H 'Accept: text/html'
-H 'User-Agent: xyz' \
-H 'Accept-Encoding: gzip' \
'http://127.0.0.1:8888/search?q=foo'
In the LOG:
DEBUG searx.botdetection.link_token : missing ping for this request: .....
Since ``BURST_MAX_SUSPICIOUS = 2`` you can repeat the query above two time
before you get a "Too Many Requests" response.
Closes: https://github.com/searxng/searxng/issues/2455
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
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