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diff --git a/v1.102/setup/turn/coturn.html b/v1.102/setup/turn/coturn.html new file mode 100644 index 0000000000..bc91834882 --- /dev/null +++ b/v1.102/setup/turn/coturn.html @@ -0,0 +1,366 @@ +<!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"> + <link rel="stylesheet" href="../../docs/website_files/version-picker.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 ? 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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->TURN->TURN->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 & iOS; for more details, see their +<a href="https://github.com/element-hq/element-android/issues/1533">respective</a> +<a href="https://github.com/element-hq/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> + <script type="text/javascript" src="../../docs/website_files/version-picker.js"></script> + <script type="text/javascript" src="../../docs/website_files/version.js"></script> + </body> +</html> |