Remote Access to Aras Server

Hi Everyone, I wonder if you can help. We are a small company, only 4 people, and we have setup a server with Aras Innovator installed. What would be recommended in terms of remote access to the server running Aras. Do we need to set the server as a domain controller and use a domain, or would it be simpler to use a workgroup (can workgroups be accessed remotely and securely?). Alternatively, would it just be easiest to use remote desktop to access the server and load up aras with in the server? Note: The server is not used for any other services other than Aras (except maybe dropdox for linking files on dropbox to Aras records)   Many thanks   Russ