Alias /roundcubemail /usr/share/roundcubemail

<Directory /usr/share/roundcubemail/>
    <IfModule mod_authz_core.c>
        # Apache 2.4
Require all granted
  </IfModule>
   <IfModule !mod_authz_core.c>
       # Apache 2.2
        Order Deny,Allow
Allow from all
    </IfModule>
</Directory>

<Directory /usr/share/roundcubemail/installer/>
  <IfModule mod_authz_core.c>
      # Apache 2.4
      Require local
       Require all granted
   </IfModule>
   <IfModule !mod_authz_core.c>
        Order Deny,Allow
Allow from all
        Allow from 127.0.0.1
        Allow from ::1
    </IfModule>
</Directory>

<Directory /usr/share/roundcubemail/bin/>
    Order Allow,Deny
    Deny from all
</Directory>
<Directory /usr/share/roundcubemail/plugins/enigma/home/>
    Order Allow,Deny
    Deny from all
</Directory>