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<title>outgoing: &#8212; SearXNG Documentation (2024.12.1+0245e82bd)</title>
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<li class="nav-item nav-item-0"><a href="../../index.html">SearXNG Documentation (2024.12.1+0245e82bd)</a> &#187;</li>
<li class="nav-item nav-item-1"><a href="../index.html" >Administrator documentation</a> &#187;</li>
<li class="nav-item nav-item-2"><a href="index.html" accesskey="U">Settings</a> &#187;</li>
<li class="nav-item nav-item-this"><a href=""><code class="docutils literal notranslate"><span class="pre">outgoing:</span></code></a></li>
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<section id="outgoing">
<span id="settings-outgoing"></span><h1><code class="docutils literal notranslate"><span class="pre">outgoing:</span></code><a class="headerlink" href="#outgoing" title="Link to this heading"></a></h1>
<p>Communication with search engines.</p>
<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">outgoing</span><span class="p">:</span>
<span class="w"> </span><span class="nt">request_timeout</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">2.0</span><span class="w"> </span><span class="c1"># default timeout in seconds, can be override by engine</span>
<span class="w"> </span><span class="nt">max_request_timeout</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">10.0</span><span class="w"> </span><span class="c1"># the maximum timeout in seconds</span>
<span class="w"> </span><span class="nt">useragent_suffix</span><span class="p">:</span><span class="w"> </span><span class="s">&quot;&quot;</span><span class="w"> </span><span class="c1"># information like an email address to the administrator</span>
<span class="w"> </span><span class="nt">pool_connections</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">100</span><span class="w"> </span><span class="c1"># Maximum number of allowable connections, or null</span>
<span class="w"> </span><span class="c1"># for no limits. The default is 100.</span>
<span class="w"> </span><span class="nt">pool_maxsize</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">10</span><span class="w"> </span><span class="c1"># Number of allowable keep-alive connections, or null</span>
<span class="w"> </span><span class="c1"># to always allow. The default is 10.</span>
<span class="w"> </span><span class="nt">enable_http2</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">true</span><span class="w"> </span><span class="c1"># See https://www.python-httpx.org/http2/</span>
<span class="w"> </span><span class="c1"># uncomment below section if you want to use a custom server certificate</span>
<span class="w"> </span><span class="c1"># see https://www.python-httpx.org/advanced/#changing-the-verification-defaults</span>
<span class="w"> </span><span class="c1"># and https://www.python-httpx.org/compatibility/#ssl-configuration</span>
<span class="w"> </span><span class="c1"># verify: ~/.mitmproxy/mitmproxy-ca-cert.cer</span>
<span class="w"> </span><span class="c1">#</span>
<span class="w"> </span><span class="c1"># uncomment below section if you want to use a proxyq see: SOCKS proxies</span>
<span class="w"> </span><span class="c1"># https://2.python-requests.org/en/latest/user/advanced/#proxies</span>
<span class="w"> </span><span class="c1"># are also supported: see</span>
<span class="w"> </span><span class="c1"># https://2.python-requests.org/en/latest/user/advanced/#socks</span>
<span class="w"> </span><span class="c1">#</span>
<span class="w"> </span><span class="c1"># proxies:</span>
<span class="w"> </span><span class="c1"># all://:</span>
<span class="w"> </span><span class="c1"># - http://proxy1:8080</span>
<span class="w"> </span><span class="c1"># - http://proxy2:8080</span>
<span class="w"> </span><span class="c1">#</span>
<span class="w"> </span><span class="c1"># using_tor_proxy: true</span>
<span class="w"> </span><span class="c1">#</span>
<span class="w"> </span><span class="c1"># Extra seconds to add in order to account for the time taken by the proxy</span>
<span class="w"> </span><span class="c1">#</span>
<span class="w"> </span><span class="c1"># extra_proxy_timeout: 10.0</span>
<span class="w"> </span><span class="c1">#</span>
</pre></div>
</div>
<dl class="simple">
<dt><code class="docutils literal notranslate"><span class="pre">request_timeout</span></code> :</dt><dd><p>Global timeout of the requests made to others engines in seconds. A bigger
timeout will allow to wait for answers from slow engines, but in consequence
will slow SearXNG reactivity (the result page may take the time specified in the
timeout to load). Can be override by <code class="docutils literal notranslate"><span class="pre">timeout</span></code> in the <a class="reference internal" href="settings_engine.html#settings-engine"><span class="std std-ref">engine:</span></a>.</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">useragent_suffix</span></code> :</dt><dd><p>Suffix to the user-agent SearXNG uses to send requests to others engines. If an
engine wish to block you, a contact info here may be useful to avoid that.</p>
</dd>
</dl>
<dl class="simple">
<dt><code class="docutils literal notranslate"><span class="pre">pool_maxsize</span></code>:</dt><dd><p>Number of allowable keep-alive connections, or <code class="docutils literal notranslate"><span class="pre">null</span></code> to always allow. The
default is 10. See <code class="docutils literal notranslate"><span class="pre">max_keepalive_connections</span></code> <a class="reference external" href="https://www.python-httpx.org/advanced/#pool-limit-configuration">Pool limit configuration</a>.</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">pool_connections</span></code> :</dt><dd><p>Maximum number of allowable connections, or <code class="docutils literal notranslate"><span class="pre">null</span></code> # for no limits. The
default is 100. See <code class="docutils literal notranslate"><span class="pre">max_connections</span></code> <a class="reference external" href="https://www.python-httpx.org/advanced/#pool-limit-configuration">Pool limit configuration</a>.</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">keepalive_expiry</span></code> :</dt><dd><p>Number of seconds to keep a connection in the pool. By default 5.0 seconds.
See <code class="docutils literal notranslate"><span class="pre">keepalive_expiry</span></code> <a class="reference external" href="https://www.python-httpx.org/advanced/#pool-limit-configuration">Pool limit configuration</a>.</p>
</dd>
</dl>
<dl class="simple">
<dt><code class="docutils literal notranslate"><span class="pre">proxies</span></code> :</dt><dd><p>Define one or more proxies you wish to use, see <a class="reference external" href="https://www.python-httpx.org/advanced/#http-proxying">httpx proxies</a>.
If there are more than one proxy for one protocol (http, https),
requests to the engines are distributed in a round-robin fashion.</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">source_ips</span></code> :</dt><dd><p>If you use multiple network interfaces, define from which IP the requests must
be made. Example:</p>
<ul class="simple">
<li><p><code class="docutils literal notranslate"><span class="pre">0.0.0.0</span></code> any local IPv4 address.</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">::</span></code> any local IPv6 address.</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">192.168.0.1</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">[</span> <span class="pre">192.168.0.1,</span> <span class="pre">192.168.0.2</span> <span class="pre">]</span></code> these two specific IP addresses</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">fe80::60a2:1691:e5a2:ee1f</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">fe80::60a2:1691:e5a2:ee1f/126</span></code> all IP addresses in this network.</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">[</span> <span class="pre">192.168.0.1,</span> <span class="pre">fe80::/126</span> <span class="pre">]</span></code></p></li>
</ul>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">retries</span></code> :</dt><dd><p>Number of retry in case of an HTTP error. On each retry, SearXNG uses an
different proxy and source ip.</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">enable_http2</span></code> :</dt><dd><p>Enable by default. Set to <code class="docutils literal notranslate"><span class="pre">false</span></code> to disable HTTP/2.</p>
</dd>
</dl>
<dl>
<dt><code class="docutils literal notranslate"><span class="pre">verify</span></code>:<span class="classifier"><code class="docutils literal notranslate"><span class="pre">$SSL_CERT_FILE</span></code>, <code class="docutils literal notranslate"><span class="pre">$SSL_CERT_DIR</span></code></span></dt><dd><p>Allow to specify a path to certificate.
see <a class="reference external" href="https://www.python-httpx.org/advanced/#changing-the-verification-defaults">httpx verification defaults</a>.</p>
<p>In addition to <code class="docutils literal notranslate"><span class="pre">verify</span></code>, SearXNG supports the <code class="docutils literal notranslate"><span class="pre">$SSL_CERT_FILE</span></code> (for a file) and
<code class="docutils literal notranslate"><span class="pre">$SSL_CERT_DIR</span></code> (for a directory) OpenSSL variables.
see <a class="reference external" href="https://www.python-httpx.org/compatibility/#ssl-configuration">httpx ssl configuration</a>.</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">max_redirects</span></code> :</dt><dd><p>30 by default. Maximum redirect before it is an error.</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">using_tor_proxy</span></code> :</dt><dd><p>Using tor proxy (<code class="docutils literal notranslate"><span class="pre">true</span></code>) or not (<code class="docutils literal notranslate"><span class="pre">false</span></code>) for all engines. The default is
<code class="docutils literal notranslate"><span class="pre">false</span></code> and can be overwritten in the <a class="reference internal" href="settings_engine.html#settings-engine"><span class="std std-ref">engine:</span></a></p>
</dd>
</dl>
</section>
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<h3><a href="../../index.html">Table of Contents</a></h3>
<ul class="current">
<li class="toctree-l1"><a class="reference internal" href="../../user/index.html">User information</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../own-instance.html">Why use a private instance?</a></li>
<li class="toctree-l1 current"><a class="reference internal" href="../index.html">Administrator documentation</a><ul class="current">
<li class="toctree-l2 current"><a class="reference internal" href="index.html">Settings</a><ul class="current">
<li class="toctree-l3"><a class="reference internal" href="settings.html"><code class="docutils literal notranslate"><span class="pre">settings.yml</span></code></a></li>
<li class="toctree-l3"><a class="reference internal" href="settings_engine.html"><code class="docutils literal notranslate"><span class="pre">engine:</span></code></a></li>
<li class="toctree-l3"><a class="reference internal" href="settings_brand.html"><code class="docutils literal notranslate"><span class="pre">brand:</span></code></a></li>
<li class="toctree-l3"><a class="reference internal" href="settings_general.html"><code class="docutils literal notranslate"><span class="pre">general:</span></code></a></li>
<li class="toctree-l3"><a class="reference internal" href="settings_search.html"><code class="docutils literal notranslate"><span class="pre">search:</span></code></a></li>
<li class="toctree-l3"><a class="reference internal" href="settings_server.html"><code class="docutils literal notranslate"><span class="pre">server:</span></code></a></li>
<li class="toctree-l3"><a class="reference internal" href="settings_ui.html"><code class="docutils literal notranslate"><span class="pre">ui:</span></code></a></li>
<li class="toctree-l3"><a class="reference internal" href="settings_redis.html"><code class="docutils literal notranslate"><span class="pre">redis:</span></code></a></li>
<li class="toctree-l3 current"><a class="current reference internal" href="#"><code class="docutils literal notranslate"><span class="pre">outgoing:</span></code></a></li>
<li class="toctree-l3"><a class="reference internal" href="settings_categories_as_tabs.html"><code class="docutils literal notranslate"><span class="pre">categories_as_tabs:</span></code></a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="../installation.html">Installation</a></li>
<li class="toctree-l2"><a class="reference internal" href="../installation-docker.html">Docker Container</a></li>
<li class="toctree-l2"><a class="reference internal" href="../installation-scripts.html">Installation Script</a></li>
<li class="toctree-l2"><a class="reference internal" href="../installation-searxng.html">Step by step installation</a></li>
<li class="toctree-l2"><a class="reference internal" href="../installation-uwsgi.html">uWSGI</a></li>
<li class="toctree-l2"><a class="reference internal" href="../installation-nginx.html">NGINX</a></li>
<li class="toctree-l2"><a class="reference internal" href="../installation-apache.html">Apache</a></li>
<li class="toctree-l2"><a class="reference internal" href="../update-searxng.html">SearXNG maintenance</a></li>
<li class="toctree-l2"><a class="reference internal" href="../answer-captcha.html">Answer CAPTCHA from server’s IP</a></li>
<li class="toctree-l2"><a class="reference internal" href="../searx.favicons.html">Favicons</a></li>
<li class="toctree-l2"><a class="reference internal" href="../searx.limiter.html">Limiter</a></li>
<li class="toctree-l2"><a class="reference internal" href="../api.html">Administration API</a></li>
<li class="toctree-l2"><a class="reference internal" href="../architecture.html">Architecture</a></li>
<li class="toctree-l2"><a class="reference internal" href="../plugins.html">Plugins builtin</a></li>
<li class="toctree-l2"><a class="reference internal" href="../buildhosts.html">Buildhosts</a></li>
</ul>
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<li class="toctree-l1"><a class="reference internal" href="../../dev/index.html">Developer documentation</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../utils/index.html">DevOps tooling box</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../src/index.html">Source-Code</a></li>
</ul>
<h3>Project Links</h3>
<ul>
<li><a href="https://github.com/searxng/searxng/tree/master">Source</a>
<li><a href="https://github.com/searxng/searxng/wiki">Wiki</a>
<li><a href="https://searx.space">Public instances</a>
<li><a href="https://github.com/searxng/searxng/issues">Issue Tracker</a>
</ul><h3>Navigation</h3>
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<li><a href="../index.html">Administrator documentation</a>
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<li><a href="index.html">Settings</a>
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<li>Previous: <a href="settings_redis.html" title="previous chapter"><code class="docutils literal notranslate"><span class="pre">redis:</span></code></a>
<li>Next: <a href="settings_categories_as_tabs.html" title="next chapter"><code class="docutils literal notranslate"><span class="pre">categories_as_tabs:</span></code></a></ul>
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