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[doc] answer CAPTCHA from server's IP

Related: https://github.com/searxng/searxng/issues/2011#issuecomment-1553317619
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
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Markus Heiser 2023-05-21 20:50:14 +02:00
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===============================
Answer CAPTCHA from server's IP
===============================
With a SSH tunnel we can send requests from server's IP and solve a CAPTCHA that
blocks requests from this IP. If your SearXNG instance is hosted at
``example.org`` and your login is ``user`` you can setup a proxy simply by
:man:`ssh`:
.. code:: bash
# SOCKS server: socks://127.0.0.1:8080
$ ssh -q -N -D 8080 user@example.org
The ``socks://localhost:8080`` from above can be tested by:
.. tabs::
.. group-tab:: server's IP
.. code:: bash
$ curl -x socks://127.0.0.1:8080 http://ipecho.net/plain
n.n.n.n
.. group-tab:: desktop's IP
.. code:: bash
$ curl http://ipecho.net/plain
x.x.x.x
In the settings of the WEB browser open the *"Network Settings"* and setup a
proxy on ``SOCKS5 127.0.0.1:8080`` (see screenshot below). In the WEB browser
check the IP from the server is used:
- http://ipecho.net/plain
Now open the search engine that blocks requests from your server's IP. If you
have `issues with the qwant engine
<https://github.com/searxng/searxng/issues/2011#issuecomment-1553317619>`__,
solve the CAPTCHA from `qwant.com <https://www.qwant.com/>`__.
-----
.. tabs::
.. group-tab:: Firefox
.. kernel-figure:: answer-captcha/ffox-setting-proxy-socks.png
:alt: FFox proxy on SOCKS5, 127.0.0.1:8080
Firefox's network settings
.. admonition:: :man:`ssh` manual:
-D [bind_address:]port
Specifies a local “dynamic” application-level port forwarding. This works
by allocating a socket to listen to port on the local side .. Whenever a
connection is made to this port, the connection is forwarded over the
secure channel, and the application protocol is then used to determine
where to connect to from the remote machine .. ssh will act as a SOCKS
server ..
-N
Do not execute a remote command. This is useful for just forwarding ports.

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@ -14,6 +14,7 @@ Administrator documentation
installation-nginx
installation-apache
update-searxng
answer-captcha
engines/index
api
architecture