diff --git a/doc/file.README.html b/doc/file.README.html
index 8116c35..c05f9a3 100644
--- a/doc/file.README.html
+++ b/doc/file.README.html
@@ -69,6 +69,17 @@
 <p><a href="#warning">WARNING</a></p>
 </li><li>
 <p><a href="#features">Features</a></p>
+<ul><li>
+<p><a href="#installation">Installation</a></p>
+</li><li>
+<p><a href="#configuration">Configuration</a></p>
+</li><li>
+<p><a href="#core">Core</a></p>
+</li><li>
+<p><a href="#optional">Optional</a></p>
+</li><li>
+<p><a href="#service">Service</a></p>
+</li></ul>
 </li><li>
 <p><a href="#dependencies">Dependencies</a></p>
 </li><li>
@@ -101,12 +112,14 @@
 
 <h2 id="label-Features">Features</h2>
 
-<p>Installation</p>
+<h3 id="label-Installation">Installation</h3>
 <ul><li>
 <p>install required binaries</p>
 </li></ul>
 
-<p>Configuration</p>
+<h3 id="label-Configuration">Configuration</h3>
+
+<h4 id="label-Core">Core</h4>
 <ul><li>
 <p>manage directory structure (file system permissions, selinux context)</p>
 </li><li>
@@ -130,7 +143,12 @@
 <p><code>fn_bantime</code>: the the time an attacker IP is banned.</p>
 </li></ul>
 
-<p>Service</p>
+<h4 id="label-Optional">Optional</h4>
+<ul><li>
+<p>enable nagios monitoring of the fail2ban service, where the number of minimum allowed processes can be configured with <code>fn_procs_allowed</code>.</p>
+</li></ul>
+
+<h3 id="label-Service">Service</h3>
 <ul><li>
 <p>manage service status</p>
 </li></ul>
diff --git a/doc/index.html b/doc/index.html
index 7218daf..d779a69 100644
--- a/doc/index.html
+++ b/doc/index.html
@@ -69,6 +69,17 @@
 <p><a href="#warning">WARNING</a></p>
 </li><li>
 <p><a href="#features">Features</a></p>
+<ul><li>
+<p><a href="#installation">Installation</a></p>
+</li><li>
+<p><a href="#configuration">Configuration</a></p>
+</li><li>
+<p><a href="#core">Core</a></p>
+</li><li>
+<p><a href="#optional">Optional</a></p>
+</li><li>
+<p><a href="#service">Service</a></p>
+</li></ul>
 </li><li>
 <p><a href="#dependencies">Dependencies</a></p>
 </li><li>
@@ -101,12 +112,14 @@
 
 <h2 id="label-Features">Features</h2>
 
-<p>Installation</p>
+<h3 id="label-Installation">Installation</h3>
 <ul><li>
 <p>install required binaries</p>
 </li></ul>
 
-<p>Configuration</p>
+<h3 id="label-Configuration">Configuration</h3>
+
+<h4 id="label-Core">Core</h4>
 <ul><li>
 <p>manage directory structure (file system permissions, selinux context)</p>
 </li><li>
@@ -130,7 +143,12 @@
 <p><code>fn_bantime</code>: the the time an attacker IP is banned.</p>
 </li></ul>
 
-<p>Service</p>
+<h4 id="label-Optional">Optional</h4>
+<ul><li>
+<p>enable nagios monitoring of the fail2ban service, where the number of minimum allowed processes can be configured with <code>fn_procs_allowed</code>.</p>
+</li></ul>
+
+<h3 id="label-Service">Service</h3>
 <ul><li>
 <p>manage service status</p>
 </li></ul>