1 files changed, 26 insertions, 1 deletions

diff --git a/doc/book-enea-nfv-access-getting-started/doc/installation_guide.xml b/doc/book-enea-nfv-access-getting-started/doc/installation_guide.xml
index 368f908..f74b670 100644
--- a/doc/book-enea-nfv-access-getting-started/doc/installation_guide.xml
+++ b/doc/book-enea-nfv-access-getting-started/doc/installation_guide.xml
@@ -239,6 +239,9 @@ sudo firewall-cmd --reload</programlisting>
         also be enabled on the respective firewall. As an additional
         requirement, port 22/TCP also needs to be enabled for reverse SSH to
         the Enea uCPE Manager.</para>
+        
+        <para>No enabling and no forwarding rules are necessary for ports 
+          2021-2040 if the version of Enea NFV Access is 2.4.0 or newer.</para>
       </note>
     </section>
 
@@ -630,6 +633,14 @@ Enea_NFV_Access_uCPEManager_&lt;version&gt;-build&lt;build_number&gt;.tar.gz</pr
           <para>The IPv4 address of the CentOS 7 Server, connected to the same
           network as the uCPE Devices, will be used as a configuration
           parameter when setting up the uCPE devices.</para>
+
+          <para>If the CentOS 7 Server is installed behind NAT, the IPv4
+          address used will be the public IP of the NAT device and port forwarding
+          rules must be created to ensure the uCPE device can access the Enea uCPE
+          Manager. For more details, please see <link
+          linkend="firewall_config">Firewall Configuration</link>
+            .</para>
+
         </note>
       </section>
 
@@ -775,7 +786,21 @@ of=/dev/sdb bs=4M conv=fsync</programlisting>
 
           <itemizedlist>
             <listitem>
-              <para>The static Enea uCPE Manager IP Address.</para>
+              <para>The static Enea uCPE Manager IP Address. This can be
+              either:</para>
+              
+              <itemizedlist>
+                  <listitem>
+                    <para>The IP address of the Enea uCPE Manager host machine, if
+                    the device can directly access it.</para>
+                  </listitem>
+
+                  <listitem>
+                    <para>The IP address of the NAT device, if the Enea uCPE Manager 
+                      host is located behind a NAT. For more details, please see <link
+                    linkend="firewall_config">Firewall Configuration</link>.</para>
+                  </listitem>
+                </itemizedlist>
             </listitem>
 
             <listitem>