diff --git a/install/tpl/apache_ispconfig.conf.master b/install/tpl/apache_ispconfig.conf.master
index 2a7ac0662e9f9cbc427330016bd903b979550dc7..c968abf3679777acd99fa6b8ddbee89524d43956 100644
--- a/install/tpl/apache_ispconfig.conf.master
+++ b/install/tpl/apache_ispconfig.conf.master
@@ -1,3 +1,6 @@
+# Important: A copy of this file exists in server/conf/ folder.
+# Edit both files when applying changes.
+
 ################################################
 # ISPConfig General Apache Options
 ################################################
diff --git a/server/conf/apache_ispconfig.conf.master b/server/conf/apache_ispconfig.conf.master
index b1de2a167621b5ff3fa242e33f64be14ef3065a3..2b6038c54aa420817a0198a4b91d8ac4455f3d56 100644
--- a/server/conf/apache_ispconfig.conf.master
+++ b/server/conf/apache_ispconfig.conf.master
@@ -1,8 +1,12 @@
+# Important: A copy of this file exists in install/tpl/ folder.
+# Edit both files when applying changes.
+
 ################################################
 # ISPConfig General Apache Options
 ################################################
 ServerTokens ProductOnly
 ServerSignature Off
+DirectoryIndex index.html index.cgi index.pl index.php index.xhtml index.htm standard_index.html
 
 ################################################
 # ISPConfig Logfile configuration for vlogger