diff --git a/doc/file.README.html b/doc/file.README.html
index 7451ab0..526b481 100644
--- a/doc/file.README.html
+++ b/doc/file.README.html
@@ -95,6 +95,8 @@
 <p><a href="#adding-custom-commands">Adding custom commands</a></p>
 </li><li>
 <p><a href="#adding-templates">Adding templates</a></p>
+</li><li>
+<p><a href="#customization-outside-of-puppet">Customization outside of Puppet</a></p>
 </li></ul>
 </li><li>
 <p><a href="#puppetdb">PuppetDB</a></p>
@@ -139,6 +141,8 @@
 <p>configures the main nagios configuration file and sets values as (pre)configured per values in params, which can be overwritten.</p>
 </li><li>
 <p>if <code>ng_include_nrpe</code>is set to <code>true</code>, the confdroid_nrpe module is automatically applied on clients (<a href="https://sourcecode.confdroid.com/confdroid/confdroid_nrpe">confdroid_nrpe</a> must be in the catalogue then)</p>
+</li><li>
+<p>if <code>ng_enable_fail2ban</code>is set to <code>true</code>, a fail2ban jail and filter will be added for the Nagios service (requires confdroid_fail2ban).</p>
 </li></ul>
 
 <h2 id="label-Repo+Documentation">Repo Documentation</h2>
@@ -375,6 +379,12 @@ Re-type new password:
   }
 </code></pre>
 
+<h3 id="label-Customization+outside+of+Puppet">Customization outside of Puppet</h3>
+
+<blockquote>
+<p>Q: what if I want to add my own Nagios plugins, settings etc. outside of Puppet? Will those be overwritten? A: Puppet only controls what it knows about. You can add your own custom configuration files within <code>/etc/nagios/conf.d</code> and Nagios should recognize it, assuming it is valid code. Just beware of duplicated definitions, Nagios is very strict and merciless about this.</p>
+</blockquote>
+
 <h2 id="label-PuppetDB">PuppetDB</h2>
 
 <p>A working instance of PuppetDB connected to the Puppet master is required for this to work. Installation and configuration of PuppetDB is out of scope for this module, however <a href="https://gitlab.confdroid.com/puppet/cd_puppetdb">cd_puppetdb</a> is available to automate this task for you as well within a few minutes.</p>
diff --git a/doc/index.html b/doc/index.html
index f1a8f49..6618dd5 100644
--- a/doc/index.html
+++ b/doc/index.html
@@ -95,6 +95,8 @@
 <p><a href="#adding-custom-commands">Adding custom commands</a></p>
 </li><li>
 <p><a href="#adding-templates">Adding templates</a></p>
+</li><li>
+<p><a href="#customization-outside-of-puppet">Customization outside of Puppet</a></p>
 </li></ul>
 </li><li>
 <p><a href="#puppetdb">PuppetDB</a></p>
@@ -139,6 +141,8 @@
 <p>configures the main nagios configuration file and sets values as (pre)configured per values in params, which can be overwritten.</p>
 </li><li>
 <p>if <code>ng_include_nrpe</code>is set to <code>true</code>, the confdroid_nrpe module is automatically applied on clients (<a href="https://sourcecode.confdroid.com/confdroid/confdroid_nrpe">confdroid_nrpe</a> must be in the catalogue then)</p>
+</li><li>
+<p>if <code>ng_enable_fail2ban</code>is set to <code>true</code>, a fail2ban jail and filter will be added for the Nagios service (requires confdroid_fail2ban).</p>
 </li></ul>
 
 <h2 id="label-Repo+Documentation">Repo Documentation</h2>
@@ -375,6 +379,12 @@ Re-type new password:
   }
 </code></pre>
 
+<h3 id="label-Customization+outside+of+Puppet">Customization outside of Puppet</h3>
+
+<blockquote>
+<p>Q: what if I want to add my own Nagios plugins, settings etc. outside of Puppet? Will those be overwritten? A: Puppet only controls what it knows about. You can add your own custom configuration files within <code>/etc/nagios/conf.d</code> and Nagios should recognize it, assuming it is valid code. Just beware of duplicated definitions, Nagios is very strict and merciless about this.</p>
+</blockquote>
+
 <h2 id="label-PuppetDB">PuppetDB</h2>
 
 <p>A working instance of PuppetDB connected to the Puppet master is required for this to work. Installation and configuration of PuppetDB is out of scope for this module, however <a href="https://gitlab.confdroid.com/puppet/cd_puppetdb">cd_puppetdb</a> is available to automate this task for you as well within a few minutes.</p>