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  <section id="security-overview">
<h1 id="security-overview--page-root">Security overview<a class="headerlink" href="#security-overview--page-root" title="Permalink to this heading">#</a></h1>
<p>After the initial <a class="reference internal" href="../installation.html"><span class="doc">installation</span></a> of your cluster, security
is the next major concern for successfully operating Trino. This overview
provides an introduction to different aspects of configuring security for your
Trino cluster.</p>
<section id="aspects-of-configuring-security">
<h2 id="aspects-of-configuring-security">Aspects of configuring security<a class="headerlink" href="#aspects-of-configuring-security" title="Permalink to this heading">#</a></h2>
<p>The default installation of Trino has no security features enabled. Security
can be enabled for different parts of the Trino architecture:</p>
<ul class="simple">
<li><p><a class="reference internal" href="#security-client"><span class="std std-ref">Securing client access to the cluster</span></a></p></li>
<li><p><a class="reference internal" href="#security-inside-cluster"><span class="std std-ref">Securing inside the cluster</span></a></p></li>
<li><p><a class="reference internal" href="#security-data-sources"><span class="std std-ref">Securing cluster access to data sources</span></a></p></li>
</ul>
</section>
<section id="suggested-configuration-workflow">
<h2 id="suggested-configuration-workflow">Suggested configuration workflow<a class="headerlink" href="#suggested-configuration-workflow" title="Permalink to this heading">#</a></h2>
<p>To configure security for a new Trino cluster, follow this best practice
order of steps. Do not skip or combine steps.</p>
<ol class="arabic">
<li><p><strong>Enable</strong> <a class="reference internal" href="tls.html"><span class="doc">TLS/HTTPS</span></a></p>
<ul class="simple">
<li><p>Work with your security team.</p></li>
<li><p>Use a <a class="reference internal" href="tls.html#https-load-balancer"><span class="std std-ref">load balancer or proxy</span></a> to terminate
HTTPS, if possible.</p></li>
<li><p>Use a globally trusted TLS certificate.</p></li>
</ul>
<p><a class="reference internal" href="tls.html#verify-tls"><span class="std std-ref">Verify this step is working correctly.</span></a></p>
</li>
<li><p><strong>Configure</strong> a <a class="reference internal" href="internal-communication.html"><span class="doc">a shared secret</span></a></p>
<p><a class="reference internal" href="internal-communication.html#verify-secrets"><span class="std std-ref">Verify this step is working correctly.</span></a></p>
</li>
<li><p><strong>Enable authentication</strong></p>
<ul class="simple">
<li><p>Start with <a class="reference internal" href="password-file.html"><span class="doc">password file authentication</span></a> to get up
and running.</p></li>
<li><p>Then configure your preferred authentication provider, such as <a class="reference internal" href="ldap.html"><span class="doc">LDAP</span></a>.</p></li>
<li><p>Avoid the complexity of Kerberos for client authentication, if possible.</p></li>
</ul>
<p><a class="reference internal" href="password-file.html#verify-authentication"><span class="std std-ref">Verify this step is working correctly.</span></a></p>
</li>
<li><p><strong>Enable authorization and access control</strong></p>
<ul class="simple">
<li><p>Start with <a class="reference internal" href="file-system-access-control.html"><span class="doc">file-based rules</span></a>.</p></li>
<li><p>Then configure another access control method as required.</p></li>
</ul>
<p><a class="reference internal" href="file-system-access-control.html#verify-rules"><span class="std std-ref">Verify this step is working correctly.</span></a></p>
</li>
</ol>
<p>Configure one step at a time. Always restart the Trino server after each
change, and verify the results before proceeding.</p>
</section>
<section id="securing-client-access-to-the-cluster">
<span id="security-client"></span><h2 id="securing-client-access-to-the-cluster">Securing client access to the cluster<a class="headerlink" href="#securing-client-access-to-the-cluster" title="Permalink to this heading">#</a></h2>
<p>Trino <a class="reference internal" href="../client.html"><span class="doc">clients</span></a> include the Trino <a class="reference internal" href="../client/cli.html"><span class="doc">CLI</span></a>,
the <a class="reference internal" href="../admin/web-interface.html"><span class="doc">Web UI</span></a>, the <a class="reference internal" href="../client/jdbc.html"><span class="doc">JDBC driver</span></a>, <a class="reference external" href="https://trino.io/resources.html">Python, Go, or other clients</a>, and any applications using these tools.</p>
<p>All access to the Trino cluster is managed by the coordinator. Thus, securing
access to the cluster means securing access to the coordinator.</p>
<p>There are three aspects to consider:</p>
<ul class="simple">
<li><p><a class="reference internal" href="#cl-access-encrypt"><span class="std std-ref">Encryption</span></a>: protecting the integrity of client to server
communication in transit.</p></li>
<li><p><a class="reference internal" href="#cl-access-auth"><span class="std std-ref">Authentication</span></a>: identifying users and user name management.</p></li>
<li><p><a class="reference internal" href="#cl-access-control"><span class="std std-ref">Authorization and access control</span></a>: validating each user’s access rights.</p></li>
</ul>
<section id="encryption">
<span id="cl-access-encrypt"></span><h3 id="encryption">Encryption<a class="headerlink" href="#encryption" title="Permalink to this heading">#</a></h3>
<p>The Trino server uses the standard <a class="reference internal" href="tls.html"><span class="doc">HTTPS protocol and TLS encryption</span></a>, formerly known as SSL.</p>
</section>
<section id="authentication">
<span id="cl-access-auth"></span><h3 id="authentication">Authentication<a class="headerlink" href="#authentication" title="Permalink to this heading">#</a></h3>
<p>Trino supports several authentication providers. When setting up a new cluster,
start with simple password file authentication before configuring another
provider.</p>
<ul class="simple">
<li><p><a class="reference internal" href="password-file.html"><span class="doc">Password file authentication</span></a></p></li>
<li><p><a class="reference internal" href="ldap.html"><span class="doc">LDAP authentication</span></a></p></li>
<li><p><a class="reference internal" href="salesforce.html"><span class="doc">Salesforce authentication</span></a></p></li>
<li><p><a class="reference internal" href="oauth2.html"><span class="doc">OAuth 2.0 authentication</span></a></p></li>
<li><p><a class="reference internal" href="certificate.html"><span class="doc">Certificate authentication</span></a></p></li>
<li><p><a class="reference internal" href="jwt.html"><span class="doc">JSON Web Token (JWT) authentication</span></a></p></li>
<li><p><a class="reference internal" href="kerberos.html"><span class="doc">Kerberos authentication</span></a></p></li>
</ul>
<section id="user-name-management">
<span id="id1"></span><h4 id="user-name-management">User name management<a class="headerlink" href="#user-name-management" title="Permalink to this heading">#</a></h4>
<p>Trino provides ways to map the user and group names from authentication
providers to Trino user names.</p>
<ul class="simple">
<li><p><a class="reference internal" href="user-mapping.html"><span class="doc">User mapping</span></a> applies to all authentication systems,
and allows for regular expression rules to be specified that map complex user
names from other systems (<code class="docutils literal notranslate"><span class="pre">alice@example.com</span></code>) to simple user names
(<code class="docutils literal notranslate"><span class="pre">alice</span></code>).</p></li>
<li><p><a class="reference internal" href="group-file.html"><span class="doc">File group provider</span></a> provides a way to assign a set
of user names to a group name to ease access control.</p></li>
</ul>
</section>
</section>
<section id="authorization-and-access-control">
<span id="cl-access-control"></span><h3 id="authorization-and-access-control">Authorization and access control<a class="headerlink" href="#authorization-and-access-control" title="Permalink to this heading">#</a></h3>
<p>Trino’s <a class="reference internal" href="built-in-system-access-control.html"><span class="doc">default method of access control</span></a>
allows all operations for all authenticated users.</p>
<p>To implement access control, use:</p>
<ul class="simple">
<li><p><a class="reference internal" href="file-system-access-control.html"><span class="doc">File-based system access control</span></a>, where
you configure JSON files that specify fine-grained user access restrictions at
the catalog, schema, or table level.</p></li>
</ul>
<p>In addition, Trino <a class="reference internal" href="../develop/system-access-control.html"><span class="doc">provides an API</span></a> that
allows you to create a custom access control method, or to extend an existing
one.</p>
<p>Access control can limit access to columns of a table. The default behavior
of a query to all columns with a <code class="docutils literal notranslate"><span class="pre">SELECT</span> <span class="pre">*</span></code> statement is to show an error
denying access to any inaccessible columns.</p>
<p>You can change this behavior to silently hide inaccessible columns with the
global property <code class="docutils literal notranslate"><span class="pre">hide-inaccessible-columns</span></code> configured in
<a class="reference internal" href="../installation/deployment.html#config-properties"><span class="std std-ref">Config properties</span></a>:</p>
<div class="highlight-properties notranslate"><div class="highlight"><pre><span></span><span class="na">hide-inaccessible-columns</span> <span class="o">=</span> <span class="s">true</span>
</pre></div>
</div>
</section>
</section>
<section id="securing-inside-the-cluster">
<span id="security-inside-cluster"></span><h2 id="securing-inside-the-cluster">Securing inside the cluster<a class="headerlink" href="#securing-inside-the-cluster" title="Permalink to this heading">#</a></h2>
<p>You can <a class="reference internal" href="internal-communication.html"><span class="doc">secure the internal communication</span></a>
between coordinator and workers inside the clusters.</p>
<p>Secrets in properties files, such as passwords in catalog files, can be secured
with <a class="reference internal" href="secrets.html"><span class="doc">secrets management</span></a>.</p>
</section>
<section id="securing-cluster-access-to-data-sources">
<span id="security-data-sources"></span><h2 id="securing-cluster-access-to-data-sources">Securing cluster access to data sources<a class="headerlink" href="#securing-cluster-access-to-data-sources" title="Permalink to this heading">#</a></h2>
<p>Communication between the Trino cluster and data sources is configured for each
catalog. Each catalog uses a connector, which supports a variety of
security-related configurations.</p>
<p>More information is available with the documentation for individual
<a class="reference internal" href="../connector.html"><span class="doc">connectors</span></a>.</p>
<p><a class="reference internal" href="secrets.html"><span class="doc">Secrets management</span></a> can be used for the catalog properties files
content.</p>
</section>
</section>


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