|Locking down the Technicolor TG589vac v2|
With the latest version of firmware (16.2) it is now possible to lock down a router so it can only accept incomming connections from a specific IP address and port. This is extremely useful if you are using this router to connect a device which only needs to communicate with one place (e.g. a VoIP system).
The reason why you may want to do this is to reduce the chance a third party is able to connect to your devices from other locations.