summary refs log tree commit diff
path: root/v1.77/setup/turn/coturn.html
diff options
context:
space:
mode:
Diffstat (limited to 'v1.77/setup/turn/coturn.html')
-rw-r--r--v1.77/setup/turn/coturn.html351
1 files changed, 351 insertions, 0 deletions
diff --git a/v1.77/setup/turn/coturn.html b/v1.77/setup/turn/coturn.html
new file mode 100644
index 0000000000..bb85cf2670
--- /dev/null
+++ b/v1.77/setup/turn/coturn.html
@@ -0,0 +1,351 @@
+<!DOCTYPE HTML>
+<html lang="en" class="sidebar-visible no-js light">
+    <head>
+        <!-- Book generated using mdBook -->
+        <meta charset="UTF-8">
+        <title>coturn TURN server - Synapse</title>
+        <!-- Custom HTML head -->
+        <meta content="text/html; charset=utf-8" http-equiv="Content-Type">
+        <meta name="description" content="">
+        <meta name="viewport" content="width=device-width, initial-scale=1">
+        <meta name="theme-color" content="#ffffff" />
+
+        <link rel="icon" href="../../favicon.svg">
+        <link rel="shortcut icon" href="../../favicon.png">
+        <link rel="stylesheet" href="../../css/variables.css">
+        <link rel="stylesheet" href="../../css/general.css">
+        <link rel="stylesheet" href="../../css/chrome.css">
+        <link rel="stylesheet" href="../../css/print.css" media="print">
+        <!-- Fonts -->
+        <link rel="stylesheet" href="../../FontAwesome/css/font-awesome.css">
+        <link rel="stylesheet" href="../../fonts/fonts.css">
+        <!-- Highlight.js Stylesheets -->
+        <link rel="stylesheet" href="../../highlight.css">
+        <link rel="stylesheet" href="../../tomorrow-night.css">
+        <link rel="stylesheet" href="../../ayu-highlight.css">
+
+        <!-- Custom theme stylesheets -->
+        <link rel="stylesheet" href="../../docs/website_files/table-of-contents.css">
+        <link rel="stylesheet" href="../../docs/website_files/remove-nav-buttons.css">
+        <link rel="stylesheet" href="../../docs/website_files/indent-section-headers.css">
+    </head>
+    <body>
+        <!-- Provide site root to javascript -->
+        <script type="text/javascript">
+            var path_to_root = "../../";
+            var default_theme = window.matchMedia("(prefers-color-scheme: dark)").matches ? "navy" : "light";
+        </script>
+
+        <!-- Work around some values being stored in localStorage wrapped in quotes -->
+        <script type="text/javascript">
+            try {
+                var theme = localStorage.getItem('mdbook-theme');
+                var sidebar = localStorage.getItem('mdbook-sidebar');
+                if (theme.startsWith('"') && theme.endsWith('"')) {
+                    localStorage.setItem('mdbook-theme', theme.slice(1, theme.length - 1));
+                }
+                if (sidebar.startsWith('"') && sidebar.endsWith('"')) {
+                    localStorage.setItem('mdbook-sidebar', sidebar.slice(1, sidebar.length - 1));
+                }
+            } catch (e) { }
+        </script>
+
+        <!-- Set the theme before any content is loaded, prevents flash -->
+        <script type="text/javascript">
+            var theme;
+            try { theme = localStorage.getItem('mdbook-theme'); } catch(e) { }
+            if (theme === null || theme === undefined) { theme = default_theme; }
+            var html = document.querySelector('html');
+            html.classList.remove('no-js')
+            html.classList.remove('light')
+            html.classList.add(theme);
+            html.classList.add('js');
+        </script>
+
+        <!-- Hide / unhide sidebar before it is displayed -->
+        <script type="text/javascript">
+            var html = document.querySelector('html');
+            var sidebar = 'hidden';
+            if (document.body.clientWidth >= 1080) {
+                try { sidebar = localStorage.getItem('mdbook-sidebar'); } catch(e) { }
+                sidebar = sidebar || 'visible';
+            }
+            html.classList.remove('sidebar-visible');
+            html.classList.add("sidebar-" + sidebar);
+        </script>
+
+        <nav id="sidebar" class="sidebar" aria-label="Table of contents">
+            <div class="sidebar-scrollbox">
+                <ol class="chapter"><li class="chapter-item expanded affix "><li class="part-title">Introduction</li><li class="chapter-item expanded "><a href="../../welcome_and_overview.html">Welcome and Overview</a></li><li class="chapter-item expanded affix "><li class="part-title">Setup</li><li class="chapter-item expanded "><a href="../../setup/installation.html">Installation</a></li><li class="chapter-item expanded "><a href="../../postgres.html">Using Postgres</a></li><li class="chapter-item expanded "><a href="../../reverse_proxy.html">Configuring a Reverse Proxy</a></li><li class="chapter-item expanded "><a href="../../setup/forward_proxy.html">Configuring a Forward/Outbound Proxy</a></li><li class="chapter-item expanded "><a href="../../turn-howto.html">Configuring a Turn Server</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../setup/turn/coturn.html" class="active">coturn TURN server</a></li><li class="chapter-item expanded "><a href="../../setup/turn/eturnal.html">eturnal TURN server</a></li></ol></li><li class="chapter-item expanded "><a href="../../delegate.html">Delegation</a></li><li class="chapter-item expanded affix "><li class="part-title">Upgrading</li><li class="chapter-item expanded "><a href="../../upgrade.html">Upgrading between Synapse Versions</a></li><li class="chapter-item expanded affix "><li class="part-title">Usage</li><li class="chapter-item expanded "><a href="../../federate.html">Federation</a></li><li class="chapter-item expanded "><a href="../../usage/configuration/index.html">Configuration</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../usage/configuration/config_documentation.html">Configuration Manual</a></li><li class="chapter-item expanded "><a href="../../usage/configuration/homeserver_sample_config.html">Homeserver Sample Config File</a></li><li class="chapter-item expanded "><a href="../../usage/configuration/logging_sample_config.html">Logging Sample Config File</a></li><li class="chapter-item expanded "><a href="../../structured_logging.html">Structured Logging</a></li><li class="chapter-item expanded "><a href="../../templates.html">Templates</a></li><li class="chapter-item expanded "><a href="../../usage/configuration/user_authentication/index.html">User Authentication</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../usage/configuration/user_authentication/single_sign_on/index.html">Single-Sign On</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../openid.html">OpenID Connect</a></li><li class="chapter-item expanded "><a href="../../usage/configuration/user_authentication/single_sign_on/saml.html">SAML</a></li><li class="chapter-item expanded "><a href="../../usage/configuration/user_authentication/single_sign_on/cas.html">CAS</a></li><li class="chapter-item expanded "><a href="../../sso_mapping_providers.html">SSO Mapping Providers</a></li></ol></li><li class="chapter-item expanded "><a href="../../password_auth_providers.html">Password Auth Providers</a></li><li class="chapter-item expanded "><a href="../../jwt.html">JSON Web Tokens</a></li><li class="chapter-item expanded "><a href="../../usage/configuration/user_authentication/refresh_tokens.html">Refresh Tokens</a></li></ol></li><li class="chapter-item expanded "><a href="../../CAPTCHA_SETUP.html">Registration Captcha</a></li><li class="chapter-item expanded "><a href="../../application_services.html">Application Services</a></li><li class="chapter-item expanded "><a href="../../server_notices.html">Server Notices</a></li><li class="chapter-item expanded "><a href="../../consent_tracking.html">Consent Tracking</a></li><li class="chapter-item expanded "><a href="../../user_directory.html">User Directory</a></li><li class="chapter-item expanded "><a href="../../message_retention_policies.html">Message Retention Policies</a></li><li class="chapter-item expanded "><a href="../../modules/index.html">Pluggable Modules</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../modules/writing_a_module.html">Writing a module</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../modules/spam_checker_callbacks.html">Spam checker callbacks</a></li><li class="chapter-item expanded "><a href="../../modules/third_party_rules_callbacks.html">Third-party rules callbacks</a></li><li class="chapter-item expanded "><a href="../../modules/presence_router_callbacks.html">Presence router callbacks</a></li><li class="chapter-item expanded "><a href="../../modules/account_validity_callbacks.html">Account validity callbacks</a></li><li class="chapter-item expanded "><a href="../../modules/password_auth_provider_callbacks.html">Password auth provider callbacks</a></li><li class="chapter-item expanded "><a href="../../modules/background_update_controller_callbacks.html">Background update controller callbacks</a></li><li class="chapter-item expanded "><a href="../../modules/account_data_callbacks.html">Account data callbacks</a></li><li class="chapter-item expanded "><a href="../../modules/porting_legacy_module.html">Porting a legacy module to the new interface</a></li></ol></li></ol></li><li class="chapter-item expanded "><a href="../../workers.html">Workers</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../synctl_workers.html">Using synctl with Workers</a></li><li class="chapter-item expanded "><a href="../../systemd-with-workers/index.html">Systemd</a></li></ol></li></ol></li><li class="chapter-item expanded "><a href="../../usage/administration/index.html">Administration</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../usage/administration/admin_api/index.html">Admin API</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../admin_api/account_validity.html">Account Validity</a></li><li class="chapter-item expanded "><a href="../../usage/administration/admin_api/background_updates.html">Background Updates</a></li><li class="chapter-item expanded "><a href="../../admin_api/event_reports.html">Event Reports</a></li><li class="chapter-item expanded "><a href="../../admin_api/media_admin_api.html">Media</a></li><li class="chapter-item expanded "><a href="../../admin_api/purge_history_api.html">Purge History</a></li><li class="chapter-item expanded "><a href="../../admin_api/register_api.html">Register Users</a></li><li class="chapter-item expanded "><a href="../../usage/administration/admin_api/registration_tokens.html">Registration Tokens</a></li><li class="chapter-item expanded "><a href="../../admin_api/room_membership.html">Manipulate Room Membership</a></li><li class="chapter-item expanded "><a href="../../admin_api/rooms.html">Rooms</a></li><li class="chapter-item expanded "><a href="../../admin_api/server_notices.html">Server Notices</a></li><li class="chapter-item expanded "><a href="../../admin_api/statistics.html">Statistics</a></li><li class="chapter-item expanded "><a href="../../admin_api/user_admin_api.html">Users</a></li><li class="chapter-item expanded "><a href="../../admin_api/version_api.html">Server Version</a></li><li class="chapter-item expanded "><a href="../../usage/administration/admin_api/federation.html">Federation</a></li></ol></li><li class="chapter-item expanded "><a href="../../manhole.html">Manhole</a></li><li class="chapter-item expanded "><a href="../../metrics-howto.html">Monitoring</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../usage/administration/monitoring/reporting_homeserver_usage_statistics.html">Reporting Homeserver Usage Statistics</a></li></ol></li><li class="chapter-item expanded "><a href="../../usage/administration/monthly_active_users.html">Monthly Active Users</a></li><li class="chapter-item expanded "><a href="../../usage/administration/understanding_synapse_through_grafana_graphs.html">Understanding Synapse Through Grafana Graphs</a></li><li class="chapter-item expanded "><a href="../../usage/administration/useful_sql_for_admins.html">Useful SQL for Admins</a></li><li class="chapter-item expanded "><a href="../../usage/administration/database_maintenance_tools.html">Database Maintenance Tools</a></li><li class="chapter-item expanded "><a href="../../usage/administration/state_groups.html">State Groups</a></li><li class="chapter-item expanded "><a href="../../usage/administration/request_log.html">Request log format</a></li><li class="chapter-item expanded "><a href="../../usage/administration/admin_faq.html">Admin FAQ</a></li><li class="chapter-item expanded "><div>Scripts</div></li></ol></li><li class="chapter-item expanded "><li class="part-title">Development</li><li class="chapter-item expanded "><a href="../../development/contributing_guide.html">Contributing Guide</a></li><li class="chapter-item expanded "><a href="../../code_style.html">Code Style</a></li><li class="chapter-item expanded "><a href="../../development/reviews.html">Reviewing Code</a></li><li class="chapter-item expanded "><a href="../../development/releases.html">Release Cycle</a></li><li class="chapter-item expanded "><a href="../../development/git.html">Git Usage</a></li><li class="chapter-item expanded "><div>Testing</div></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../development/demo.html">Demo scripts</a></li></ol></li><li class="chapter-item expanded "><a href="../../opentracing.html">OpenTracing</a></li><li class="chapter-item expanded "><a href="../../development/database_schema.html">Database Schemas</a></li><li class="chapter-item expanded "><a href="../../development/experimental_features.html">Experimental features</a></li><li class="chapter-item expanded "><a href="../../development/dependencies.html">Dependency management</a></li><li class="chapter-item expanded "><div>Synapse Architecture</div></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../development/synapse_architecture/cancellation.html">Cancellation</a></li><li class="chapter-item expanded "><a href="../../log_contexts.html">Log Contexts</a></li><li class="chapter-item expanded "><a href="../../replication.html">Replication</a></li><li class="chapter-item expanded "><a href="../../tcp_replication.html">TCP Replication</a></li><li class="chapter-item expanded "><a href="../../development/synapse_architecture/faster_joins.html">Faster remote joins</a></li></ol></li><li class="chapter-item expanded "><a href="../../development/internal_documentation/index.html">Internal Documentation</a></li><li><ol class="section"><li class="chapter-item expanded "><div>Single Sign-On</div></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../development/saml.html">SAML</a></li><li class="chapter-item expanded "><a href="../../development/cas.html">CAS</a></li></ol></li><li class="chapter-item expanded "><a href="../../development/room-dag-concepts.html">Room DAG concepts</a></li><li class="chapter-item expanded "><div>State Resolution</div></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../auth_chain_difference_algorithm.html">The Auth Chain Difference Algorithm</a></li></ol></li><li class="chapter-item expanded "><a href="../../media_repository.html">Media Repository</a></li><li class="chapter-item expanded "><a href="../../room_and_user_statistics.html">Room and User Statistics</a></li></ol></li><li class="chapter-item expanded "><div>Scripts</div></li><li class="chapter-item expanded affix "><li class="part-title">Other</li><li class="chapter-item expanded "><a href="../../deprecation_policy.html">Dependency Deprecation Policy</a></li><li class="chapter-item expanded "><a href="../../other/running_synapse_on_single_board_computers.html">Running Synapse on a Single-Board Computer</a></li></ol>
+            </div>
+            <div id="sidebar-resize-handle" class="sidebar-resize-handle"></div>
+        </nav>
+
+        <div id="page-wrapper" class="page-wrapper">
+
+            <div class="page">
+                <div id="menu-bar-hover-placeholder"></div>
+                <div id="menu-bar" class="menu-bar sticky bordered">
+                    <div class="left-buttons">
+                        <button id="sidebar-toggle" class="icon-button" type="button" title="Toggle Table of Contents" aria-label="Toggle Table of Contents" aria-controls="sidebar">
+                            <i class="fa fa-bars"></i>
+                        </button>
+                        <button id="theme-toggle" class="icon-button" type="button" title="Change theme" aria-label="Change theme" aria-haspopup="true" aria-expanded="false" aria-controls="theme-list">
+                            <i class="fa fa-paint-brush"></i>
+                        </button>
+                        <ul id="theme-list" class="theme-popup" aria-label="Themes" role="menu">
+                            <li role="none"><button role="menuitem" class="theme" id="light">Light (default)</button></li>
+                            <li role="none"><button role="menuitem" class="theme" id="rust">Rust</button></li>
+                            <li role="none"><button role="menuitem" class="theme" id="coal">Coal</button></li>
+                            <li role="none"><button role="menuitem" class="theme" id="navy">Navy</button></li>
+                            <li role="none"><button role="menuitem" class="theme" id="ayu">Ayu</button></li>
+                        </ul>
+                        <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
+                            <i class="fa fa-search"></i>
+                        </button>
+                    </div>
+
+                    <h1 class="menu-title">Synapse</h1>
+
+                    <div class="right-buttons">
+                        <a href="../../print.html" title="Print this book" aria-label="Print this book">
+                            <i id="print-button" class="fa fa-print"></i>
+                        </a>
+                        <a href="https://github.com/matrix-org/synapse" title="Git repository" aria-label="Git repository">
+                            <i id="git-repository-button" class="fa fa-github"></i>
+                        </a>
+                        <a href="https://github.com/matrix-org/synapse/edit/develop/docs/setup/turn/coturn.md" title="Suggest an edit" aria-label="Suggest an edit">
+                            <i id="git-edit-button" class="fa fa-edit"></i>
+                        </a>
+                    </div>
+                </div>
+
+                <div id="search-wrapper" class="hidden">
+                    <form id="searchbar-outer" class="searchbar-outer">
+                        <input type="search" id="searchbar" name="searchbar" placeholder="Search this book ..." aria-controls="searchresults-outer" aria-describedby="searchresults-header">
+                    </form>
+                    <div id="searchresults-outer" class="searchresults-outer hidden">
+                        <div id="searchresults-header" class="searchresults-header"></div>
+                        <ul id="searchresults">
+                        </ul>
+                    </div>
+                </div>
+                <!-- Apply ARIA attributes after the sidebar and the sidebar toggle button are added to the DOM -->
+                <script type="text/javascript">
+                    document.getElementById('sidebar-toggle').setAttribute('aria-expanded', sidebar === 'visible');
+                    document.getElementById('sidebar').setAttribute('aria-hidden', sidebar !== 'visible');
+                    Array.from(document.querySelectorAll('#sidebar a')).forEach(function(link) {
+                        link.setAttribute('tabIndex', sidebar === 'visible' ? 0 : -1);
+                    });
+                </script>
+
+                <div id="content" class="content">
+                    <main>
+                        <!-- Page table of contents -->
+                        <div class="sidetoc">
+                            <nav class="pagetoc"></nav>
+                        </div>
+
+                        <h1 id="coturn-turn-server"><a class="header" href="#coturn-turn-server">coturn TURN server</a></h1>
+<p>The following sections describe how to install <a href="https://github.com/coturn/coturn">coturn</a> (which implements the TURN REST API).</p>
+<h2 id="coturn-setup"><a class="header" href="#coturn-setup"><code>coturn</code> setup</a></h2>
+<h3 id="initial-installation"><a class="header" href="#initial-installation">Initial installation</a></h3>
+<p>The TURN daemon <code>coturn</code> is available from a variety of sources such as native package managers, or installation from source.</p>
+<h4 id="debian-and-ubuntu-based-distributions"><a class="header" href="#debian-and-ubuntu-based-distributions">Debian and Ubuntu based distributions</a></h4>
+<p>Just install the debian package:</p>
+<pre><code class="language-sh">sudo apt install coturn
+</code></pre>
+<p>This will install and start a systemd service called <code>coturn</code>.</p>
+<h4 id="source-installation"><a class="header" href="#source-installation">Source installation</a></h4>
+<ol>
+<li>
+<p>Download the <a href="https://github.com/coturn/coturn/releases/latest">latest release</a> from github.  Unpack it and <code>cd</code> into the directory.</p>
+</li>
+<li>
+<p>Configure it:</p>
+<pre><code class="language-sh">./configure
+</code></pre>
+<p>You may need to install <code>libevent2</code>: if so, you should do so in
+the way recommended by your operating system. You can ignore
+warnings about lack of database support: a database is unnecessary
+for this purpose.</p>
+</li>
+<li>
+<p>Build and install it:</p>
+<pre><code class="language-sh">make
+sudo make install
+</code></pre>
+</li>
+</ol>
+<h3 id="configuration"><a class="header" href="#configuration">Configuration</a></h3>
+<ol>
+<li>
+<p>Create or edit the config file in <code>/etc/turnserver.conf</code>. The relevant
+lines, with example values, are:</p>
+<pre><code>use-auth-secret
+static-auth-secret=[your secret key here]
+realm=turn.myserver.org
+</code></pre>
+<p>See <code>turnserver.conf</code> for explanations of the options. One way to generate
+the <code>static-auth-secret</code> is with <code>pwgen</code>:</p>
+<pre><code class="language-sh">pwgen -s 64 1
+</code></pre>
+<p>A <code>realm</code> must be specified, but its value is somewhat arbitrary. (It is
+sent to clients as part of the authentication flow.) It is conventional to
+set it to be your server name.</p>
+</li>
+<li>
+<p>You will most likely want to configure <code>coturn</code> to write logs somewhere. The
+easiest way is normally to send them to the syslog:</p>
+<pre><code class="language-sh">syslog
+</code></pre>
+<p>(in which case, the logs will be available via <code>journalctl -u coturn</code> on a
+systemd system). Alternatively, <code>coturn</code> can be configured to write to a
+logfile - check the example config file supplied with <code>coturn</code>.</p>
+</li>
+<li>
+<p>Consider your security settings. TURN lets users request a relay which will
+connect to arbitrary IP addresses and ports. The following configuration is
+suggested as a minimum starting point:</p>
+<pre><code># VoIP traffic is all UDP. There is no reason to let users connect to arbitrary TCP endpoints via the relay.
+no-tcp-relay
+
+# don't let the relay ever try to connect to private IP address ranges within your network (if any)
+# given the turn server is likely behind your firewall, remember to include any privileged public IPs too.
+denied-peer-ip=10.0.0.0-10.255.255.255
+denied-peer-ip=192.168.0.0-192.168.255.255
+denied-peer-ip=172.16.0.0-172.31.255.255
+
+# recommended additional local peers to block, to mitigate external access to internal services.
+# https://www.rtcsec.com/article/slack-webrtc-turn-compromise-and-bug-bounty/#how-to-fix-an-open-turn-relay-to-address-this-vulnerability
+no-multicast-peers
+denied-peer-ip=0.0.0.0-0.255.255.255
+denied-peer-ip=100.64.0.0-100.127.255.255
+denied-peer-ip=127.0.0.0-127.255.255.255
+denied-peer-ip=169.254.0.0-169.254.255.255
+denied-peer-ip=192.0.0.0-192.0.0.255
+denied-peer-ip=192.0.2.0-192.0.2.255
+denied-peer-ip=192.88.99.0-192.88.99.255
+denied-peer-ip=198.18.0.0-198.19.255.255
+denied-peer-ip=198.51.100.0-198.51.100.255
+denied-peer-ip=203.0.113.0-203.0.113.255
+denied-peer-ip=240.0.0.0-255.255.255.255
+
+# special case the turn server itself so that client-&gt;TURN-&gt;TURN-&gt;client flows work
+# this should be one of the turn server's listening IPs
+allowed-peer-ip=10.0.0.1
+
+# consider whether you want to limit the quota of relayed streams per user (or total) to avoid risk of DoS.
+user-quota=12 # 4 streams per video call, so 12 streams = 3 simultaneous relayed calls per user.
+total-quota=1200
+</code></pre>
+</li>
+<li>
+<p>Also consider supporting TLS/DTLS. To do this, add the following settings
+to <code>turnserver.conf</code>:</p>
+<pre><code># TLS certificates, including intermediate certs.
+# For Let's Encrypt certificates, use `fullchain.pem` here.
+cert=/path/to/fullchain.pem
+
+# TLS private key file
+pkey=/path/to/privkey.pem
+
+# Ensure the configuration lines that disable TLS/DTLS are commented-out or removed
+#no-tls
+#no-dtls
+</code></pre>
+<p>In this case, replace the <code>turn:</code> schemes in the <code>turn_uris</code> settings below
+with <code>turns:</code>.</p>
+<p>We recommend that you only try to set up TLS/DTLS once you have set up a
+basic installation and got it working.</p>
+<p>NB: If your TLS certificate was provided by Let's Encrypt, TLS/DTLS will
+not work with any Matrix client that uses Chromium's WebRTC library. This
+currently includes Element Android &amp; iOS; for more details, see their
+<a href="https://github.com/vector-im/element-android/issues/1533">respective</a>
+<a href="https://github.com/vector-im/element-ios/issues/2712">issues</a> as well as the underlying
+<a href="https://bugs.chromium.org/p/webrtc/issues/detail?id=11710">WebRTC issue</a>.
+Consider using a ZeroSSL certificate for your TURN server as a working alternative.</p>
+</li>
+<li>
+<p>Ensure your firewall allows traffic into the TURN server on the ports
+you've configured it to listen on (By default: 3478 and 5349 for TURN
+traffic (remember to allow both TCP and UDP traffic), and ports 49152-65535
+for the UDP relay.)</p>
+</li>
+<li>
+<p>If your TURN server is behind NAT, the NAT gateway must have an external,
+publicly-reachable IP address. You must configure <code>coturn</code> to advertise that
+address to connecting clients:</p>
+<pre><code>external-ip=EXTERNAL_NAT_IPv4_ADDRESS
+</code></pre>
+<p>You may optionally limit the TURN server to listen only on the local
+address that is mapped by NAT to the external address:</p>
+<pre><code>listening-ip=INTERNAL_TURNSERVER_IPv4_ADDRESS
+</code></pre>
+<p>If your NAT gateway is reachable over both IPv4 and IPv6, you may
+configure <code>coturn</code> to advertise each available address:</p>
+<pre><code>external-ip=EXTERNAL_NAT_IPv4_ADDRESS
+external-ip=EXTERNAL_NAT_IPv6_ADDRESS
+</code></pre>
+<p>When advertising an external IPv6 address, ensure that the firewall and
+network settings of the system running your TURN server are configured to
+accept IPv6 traffic, and that the TURN server is listening on the local
+IPv6 address that is mapped by NAT to the external IPv6 address.</p>
+</li>
+<li>
+<p>(Re)start the turn server:</p>
+<ul>
+<li>
+<p>If you used the Debian package (or have set up a systemd unit yourself):</p>
+<pre><code class="language-sh">sudo systemctl restart coturn
+</code></pre>
+</li>
+<li>
+<p>If you built from source:</p>
+<pre><code class="language-sh">/usr/local/bin/turnserver -o
+</code></pre>
+</li>
+</ul>
+</li>
+</ol>
+
+                    </main>
+
+                    <nav class="nav-wrapper" aria-label="Page navigation">
+                        <!-- Mobile navigation buttons -->
+                            <a rel="prev" href="../../turn-howto.html" class="mobile-nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left">
+                                <i class="fa fa-angle-left"></i>
+                            </a>
+                            <a rel="next" href="../../setup/turn/eturnal.html" class="mobile-nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right">
+                                <i class="fa fa-angle-right"></i>
+                            </a>
+                        <div style="clear: both"></div>
+                    </nav>
+                </div>
+            </div>
+
+            <nav class="nav-wide-wrapper" aria-label="Page navigation">
+                    <a rel="prev" href="../../turn-howto.html" class="nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left">
+                        <i class="fa fa-angle-left"></i>
+                    </a>
+                    <a rel="next" href="../../setup/turn/eturnal.html" class="nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right">
+                        <i class="fa fa-angle-right"></i>
+                    </a>
+            </nav>
+
+        </div>
+
+        <script type="text/javascript">
+            window.playground_copyable = true;
+        </script>
+        <script src="../../elasticlunr.min.js" type="text/javascript" charset="utf-8"></script>
+        <script src="../../mark.min.js" type="text/javascript" charset="utf-8"></script>
+        <script src="../../searcher.js" type="text/javascript" charset="utf-8"></script>
+        <script src="../../clipboard.min.js" type="text/javascript" charset="utf-8"></script>
+        <script src="../../highlight.js" type="text/javascript" charset="utf-8"></script>
+        <script src="../../book.js" type="text/javascript" charset="utf-8"></script>
+
+        <!-- Custom JS scripts -->
+        <script type="text/javascript" src="../../docs/website_files/table-of-contents.js"></script>
+    </body>
+</html>
\ No newline at end of file