This is small and simple application for ownCloud. It sole purpose is to show the admin the available public IPv6 addresses and let him enable/disable Teredo to get IPv6 if he doesn’t have one yet. It also handles Dynv6 dynamic DNS service updates and can help you do IPv4 forwarding using uPnP. With uPnP it tries to setup forwarding on port 443 which is default https port and if it fails, it will try to do same on port 4443 as some routers doesn’t allow forwarding on https port.