diff --git a/doc/INSTALL.md b/doc/INSTALL.md
index 98ab7eabcb..e380d1193e 100644
--- a/doc/INSTALL.md
+++ b/doc/INSTALL.md
@@ -90,12 +90,15 @@ Next, add the following to `/etc/apache2/sites-available/librenms.conf`:
       ServerName  librenms.example.com
       CustomLog /opt/librenms/logs/access_log combined
       ErrorLog /opt/librenms/logs/error_log
+      AllowEncodedSlashes On
       <Directory "/opt/librenms/html/">
         AllowOverride All
         Options FollowSymLinks MultiViews
       </Directory>
     </VirtualHost>
 
+If you are running Apache 2.2.18 or higher then change AllowEncodedSlashes to NoDecode
+
 If you have Apache 2.3 or newer then please add the following line before `AllowOverride All`:
 
     Require all granted
diff --git a/doc/INSTALL_RHEL.md b/doc/INSTALL_RHEL.md
index ff4b3db08a..9e3ffeed5c 100644
--- a/doc/INSTALL_RHEL.md
+++ b/doc/INSTALL_RHEL.md
@@ -101,12 +101,15 @@ Next, add the following to `/etc/httpd/conf.d/librenms.conf`
       ServerName  librenms.example.com
       CustomLog /opt/librenms/logs/access_log combined
       ErrorLog /opt/librenms/logs/error_log
+      AllowEncodedSlashes On
       <Directory "/opt/librenms/html/">
         AllowOverride All
         Options FollowSymLinks MultiViews
       </Directory>
     </VirtualHost>
 
+If you are running Apache 2.2.18 or higher then change AllowEncodedSlashes to NoDecode
+
 Don't forget to restart Apache to make this active:
 
     service httpd restart
diff --git a/includes/api_functions.inc.php b/includes/api_functions.inc.php
index db524939b8..3e0695a3cf 100644
--- a/includes/api_functions.inc.php
+++ b/includes/api_functions.inc.php
@@ -215,7 +215,7 @@ function get_graph_by_port()
   $router = $app->router()->getCurrentRoute()->getParams();
   $device_id = $router['id'];
   $vars = array();
-  $vars['port'] = $router['port'];
+  $vars['port'] = urldecode($router['port']);
   $vars['type'] = $router['type'] ?: 'port_bits';
   if(!empty($router['from']))
   {