Currently we're using desktop central in our LAN network. 

Now we also want to use desktop central for our WAN pc's to take remote control of those pc's (like teamviewer for example)

Our WAN pc's are moving around the country a lot.

For example: on monday they are connected at place X, next day place Y, next day at home, another they at the main office, the lan network. Sometimes they are also working with a 3G/4G stick for internet access

How can we configure DC so that we can take remote control of pc's with WAN connection?

Thx!