Yes, it's possible.   But it won't be reliable, if it works at all, and you can convince every ISP along the road to allow those ports to be opened, and you open your own firewall.

It will be terribly insecure, I doubt the packets will be encrypted.   It will disconnect, and it'll probably be slow.  Even with VPN software, it probably won't be reliable.

The best is probably to use a host computer, whether someone outside your main office, which seems to have become vogue to call 'the cloud', even when it's not, or running a terminal server.

If you have one machine that is always on, you can use remote access software to connect to it from the other.  (LogMeIn, GoToMyPC, TeamViewer, Remote Desktop, etc.)    Microsoft limits the number of active desktop sessions, on desktop systems to One.  

If you need two mobile workstations, you'll probably need a server.  If you need one mobile and one desktop connected locally, you can just use ordinary workstations, with a workstation O/S.

In other words, if you need one remote connection, any PC at the office end will do.  If you need two, either you need a Terminal Server, or two PCs with different remote access accounts.

Hi RandyW,

Thank you for your suggestion, and as soon as I get it done through some IT person; I will inform you about its success or failure in achieving my requirement of have updated data with all the users on  real time basis.

Hi RandyW,

Thank you for your suggestion, and as soon as I get it done through some IT person; I will inform you about its success or failure in achieving my requirement of have updated data with all the users on  real time basis.