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                        <h1 id="network-proxies"><a class="header" href="#network-proxies">Network proxies</a></h1>
<p>Enterprise networks often don’t have direct outside HTTP access, but enforce
the use of proxies. If you’re on such a network, you can request that <code>rustup</code>
uses a proxy by setting its URL in the environment. In most cases, setting
<code>https_proxy</code> should be sufficient. Commands may differ between different
systems and shells:</p>
<ul>
<li>On a Unix-like system with a shell like <strong>bash</strong> or <strong>zsh</strong>:
<pre><code class="language-bash">export https_proxy=socks5://proxy.example.com:1080
</code></pre>
</li>
<li>On Windows <a href="https://en.wikipedia.org/wiki/Cmd.exe"><strong>Command Prompt (cmd)</strong></a>:
<pre><code class="language-cmd">set https_proxy=socks5://proxy.example.com:1080
</code></pre>
</li>
<li>On Windows <a href="https://en.wikipedia.org/wiki/PowerShell"><strong>PowerShell</strong></a> (or <strong>PowerShell Core</strong>):
<pre><code class="language-cmd">$env:https_proxy="socks5://proxy.example.com:1080"
</code></pre>
</li>
<li>Replace <code>socks5://proxy.example.com:1080</code> with
<code>http://proxy.example.com:8080</code> when an HTTP proxy is used instead.</li>
</ul>
<p>If you need a more complex setup, <code>rustup</code> supports the convention used by the
<strong>curl</strong> program, documented in the ENVIRONMENT section of <a href="https://curl.se/docs/manpage.html#:~:text=Environment,-The%20environment%20variables">its manual
page</a>.</p>
<p>The use of <code>curl</code> is presently <strong>deprecated</strong>, however it can still be used by
providing the <code>RUSTUP_USE_CURL</code> environment variable, for example:</p>
<pre><code class="language-bash">RUSTUP_USE_CURL=1 rustup update
</code></pre>
<p>Note that some versions of <code>libcurl</code> apparently require you to drop the
<code>http://</code> or <code>https://</code> prefix in environment variables. For example, <code>export http_proxy=proxy.example.com:1080</code> (and likewise for HTTPS). If you are
getting an SSL <code>unknown protocol</code> error from <code>rustup</code> via <code>libcurl</code> but the
command-line <code>curl</code> command works fine, this may be the problem.</p>

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