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346 lines
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<script>
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document.getElementById('mdbook-sidebar-toggle').setAttribute('aria-expanded', sidebar === 'visible');
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document.getElementById('mdbook-sidebar').setAttribute('aria-hidden', sidebar !== 'visible');
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Array.from(document.querySelectorAll('#mdbook-sidebar a')).forEach(function(link) {
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link.setAttribute('tabIndex', sidebar === 'visible' ? 0 : -1);
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<div id="mdbook-content" class="content">
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<main>
|
||
<h1 id="using-a-forward-proxy-with-synapse"><a class="header" href="#using-a-forward-proxy-with-synapse">Using a forward proxy with Synapse</a></h1>
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<p>You can use Synapse with a forward or outbound proxy. An example of when
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this is necessary is in corporate environments behind a DMZ (demilitarized zone).
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Synapse supports routing outbound HTTP(S) requests via a proxy. Only HTTP(S)
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proxy is supported, not SOCKS proxy or anything else.</p>
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<h2 id="configure"><a class="header" href="#configure">Configure</a></h2>
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<p>The proxy settings can be configured in the homeserver configuration file via
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<a href="../usage/configuration/config_documentation.html#http_proxy"><code>http_proxy</code></a>,
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<a href="../usage/configuration/config_documentation.html#https_proxy"><code>https_proxy</code></a>, and
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<a href="../usage/configuration/config_documentation.html#no_proxy_hosts"><code>no_proxy_hosts</code></a>.</p>
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<p><code>homeserver.yaml</code> example:</p>
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<pre><code class="language-yaml">http_proxy: http://USERNAME:PASSWORD@10.0.1.1:8080/
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https_proxy: http://USERNAME:PASSWORD@proxy.example.com:8080/
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no_proxy_hosts:
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- master.hostname.example.com
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- 10.1.0.0/16
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- 172.30.0.0/16
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</code></pre>
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<p>The proxy settings can also be configured via the <code>http_proxy</code>, <code>https_proxy</code>,
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<code>no_proxy</code> environment variables. The environment variable is not case sensitive.</p>
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<ul>
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<li><code>http_proxy</code>: Proxy server to use for HTTP requests.</li>
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<li><code>https_proxy</code>: Proxy server to use for HTTPS requests.</li>
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<li><code>no_proxy</code>: Comma-separated list of hosts, IP addresses, or IP ranges in CIDR
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format which should not use the proxy. Synapse will directly connect to these hosts.</li>
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</ul>
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<p>The <code>http_proxy</code> and <code>https_proxy</code> environment variables have the form: <code>[scheme://][<username>:<password>@]<host>[:<port>]</code></p>
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<ul>
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<li>
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<p>Supported schemes are <code>http://</code> and <code>https://</code>. The default scheme is <code>http://</code>
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for compatibility reasons; it is recommended to set a scheme. If scheme is set
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to <code>https://</code> the connection uses TLS between Synapse and the proxy.</p>
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<p><strong>NOTE</strong>: Synapse validates the certificates. If the certificate is not
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valid, then the connection is dropped.</p>
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</li>
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<li>
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<p>Default port if not given is <code>1080</code>.</p>
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</li>
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<li>
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<p>Username and password are optional and will be used to authenticate against
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the proxy.</p>
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</li>
|
||
</ul>
|
||
<p><strong>Examples</strong></p>
|
||
<ul>
|
||
<li>HTTP_PROXY=http://USERNAME:PASSWORD@10.0.1.1:8080/</li>
|
||
<li>HTTPS_PROXY=http://USERNAME:PASSWORD@proxy.example.com:8080/</li>
|
||
<li>NO_PROXY=master.hostname.example.com,10.1.0.0/16,172.30.0.0/16</li>
|
||
</ul>
|
||
<p><strong>NOTE</strong>:
|
||
Synapse does not apply the IP blacklist to connections through the proxy (since
|
||
the DNS resolution is done by the proxy). It is expected that the proxy or firewall
|
||
will apply blacklisting of IP addresses.</p>
|
||
<h2 id="connection-types"><a class="header" href="#connection-types">Connection types</a></h2>
|
||
<p>The proxy will be <strong>used</strong> for:</p>
|
||
<ul>
|
||
<li>push</li>
|
||
<li>url previews</li>
|
||
<li>phone-home stats</li>
|
||
<li>recaptcha validation</li>
|
||
<li>CAS auth validation</li>
|
||
<li>OpenID Connect (OIDC)</li>
|
||
<li>Outbound federation</li>
|
||
<li>Federation (checking public key revocation)</li>
|
||
<li>Fetching public keys of other servers</li>
|
||
<li>Downloading remote media</li>
|
||
</ul>
|
||
<p>It will <strong>not be used</strong> for:</p>
|
||
<ul>
|
||
<li>Application Services</li>
|
||
<li>Matrix Identity servers</li>
|
||
<li>In worker configurations
|
||
<ul>
|
||
<li>connections between workers</li>
|
||
<li>connections from workers to Redis</li>
|
||
</ul>
|
||
</li>
|
||
</ul>
|
||
<h2 id="troubleshooting"><a class="header" href="#troubleshooting">Troubleshooting</a></h2>
|
||
<p>If a proxy server is used with TLS (HTTPS) and no connections are established,
|
||
it is most likely due to the proxy’s certificates. To test this, the validation
|
||
in Synapse can be deactivated.</p>
|
||
<p><strong>NOTE</strong>: This has an impact on security and is for testing purposes only!</p>
|
||
<p>To deactivate the certificate validation, the following setting must be added to
|
||
your <a href="../usage/configuration/homeserver_sample_config.html">homeserver.yaml</a>.</p>
|
||
<pre><code class="language-yaml">use_insecure_ssl_client_just_for_testing_do_not_use: true
|
||
</code></pre>
|
||
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