diff --git a/htdocs/admin/dav.php b/htdocs/admin/dav.php
index 005394739f0..f4fbcbbdd59 100644
--- a/htdocs/admin/dav.php
+++ b/htdocs/admin/dav.php
@@ -35,7 +35,10 @@ if (!$user->admin)
 $action = GETPOST('action', 'alpha');
 $backtopage = GETPOST('backtopage', 'alpha');
 
+
+
 $arrayofparameters=array(
+	'DAV_RESTICT_ON_IP'=>array('css'=>'minwidth200', 'enabled'=>1),
     'DAV_ALLOW_PRIVATE_DIR'=>array('css'=>'minwidth200', 'enabled'=>2),
     'DAV_ALLOW_PUBLIC_DIR'=>array('css'=>'minwidth200', 'enabled'=>1),
 	'DAV_ALLOW_ECM_DIR'=>array('css'=>'minwidth200', 'enabled'=>$conf->ecm->enabled)
@@ -82,7 +85,8 @@ if ($action == 'edit')
 		if (isset($val['enabled']) && empty($val['enabled'])) continue;
 
 		print '<tr class="oddeven"><td>';
-		print $form->textwithpicto($langs->trans($key), $langs->trans($key.'Tooltip'));
+		$tooltiphelp = (($langs->trans($key.'Tooltip') != $key.'Tooltip') ? $langs->trans($key.'Tooltip') : '');
+		print $form->textwithpicto($langs->trans($key), $tooltiphelp);
 		print '</td><td>';
 		if ($key == 'DAV_ALLOW_PRIVATE_DIR')
 		{
@@ -116,7 +120,8 @@ else
 	foreach($arrayofparameters as $key => $val)
 	{
 		print '<tr class="oddeven"><td>';
-		print $form->textwithpicto($langs->trans($key), $langs->trans($key.'Tooltip'));
+		$tooltiphelp = (($langs->trans($key.'Tooltip') != $key.'Tooltip') ? $langs->trans($key.'Tooltip') : '');
+		print $form->textwithpicto($langs->trans($key), $tooltiphelp);
 		print '</td><td>';
 		if ($key == 'DAV_ALLOW_PRIVATE_DIR')
 		{
diff --git a/htdocs/api/admin/index.php b/htdocs/api/admin/index.php
index 0ca6786b9b2..979ce497ab1 100644
--- a/htdocs/api/admin/index.php
+++ b/htdocs/api/admin/index.php
@@ -130,7 +130,7 @@ print '<td>&nbsp;</td>';
 print '</tr>';
 
 print '<tr class="oddeven">';
-print '<td>'.$langs->trans("RestrictApiToIps").'</td>';
+print '<td>'.$langs->trans("RESTICT_API_ON_IP").'</td>';
 print '<td><input type="text" name="API_RESTICT_ON_IP" value="'.dol_escape_htmltag($conf->global->API_RESTICT_ON_IP).'"></td>';
 print '<td>';
 print '<input type="submit" class="button" name="save" value="'.dol_escape_htmltag($langs->trans("Save")).'"></td>';
diff --git a/htdocs/dav/fileserver.php b/htdocs/dav/fileserver.php
index b056ac9730c..4a38511305e 100644
--- a/htdocs/dav/fileserver.php
+++ b/htdocs/dav/fileserver.php
@@ -55,6 +55,22 @@ if (empty($conf->dav->enabled))
 	accessforbidden();
 
 
+// Restrict API to some IPs
+if (! empty($conf->global->DAV_RESTICT_ON_IP))
+{
+	$allowedip=explode(' ', $conf->global->DAV_RESTICT_ON_IP);
+	$ipremote = getUserRemoteIP();
+	if (! in_array($ipremote, $allowedip))
+	{
+		dol_syslog('Remote ip is '.$ipremote.', not into list '.$conf->global->DAV_RESTICT_ON_IP);
+		print 'DAV not allowed from the IP '.$ipremote;
+		header('HTTP/1.1 503 DAV not allowed from your IP '.$ipremote);
+		//print $conf->global->DAV_RESTICT_ON_IP;
+		exit(0);
+	}
+}
+
+
 $entity = (GETPOST('entity', 'int') ? GETPOST('entity', 'int') : (!empty($conf->entity) ? $conf->entity : 1));
 
 // settings
diff --git a/htdocs/langs/en_US/admin.lang b/htdocs/langs/en_US/admin.lang
index ee3da865377..726ba624434 100644
--- a/htdocs/langs/en_US/admin.lang
+++ b/htdocs/langs/en_US/admin.lang
@@ -1932,5 +1932,6 @@ DeleteEmailCollector=Delete email collector
 ConfirmDeleteEmailCollector=Are you sure you want to delete this email collector?
 RecipientEmailsWillBeReplacedWithThisValue=Recipient emails will be always replaced with this value
 AtLeastOneDefaultBankAccountMandatory=At least 1 default bank account must be defined
-RestrictApiToIps=Allow available APIs to some host IP only (wildcard not allowed, use space between values). Empty means every hosts can use the available APIs.
+RESTICT_API_ON_IP=Allow available APIs to some host IP only (wildcard not allowed, use space between values). Empty means every hosts can use the available APIs.
+RESTICT_ON_IP=Allow access to some host IP only (wildcard not allowed, use space between values). Empty means every hosts can access.
 BaseOnSabeDavVersion=Based on the library SabreDAV version
\ No newline at end of file