connecting 4 computers with the internet connection along with them

[Abdo100]

ii have 4 computers and nvrs there with network printers i want to connect them in one loaction so i can enter them through one computer wich is the primary device for example i want to have access to the cameras are in the location 1 along with rest of the locations under one hostname i guess i am not sure how but is what i want!.

[solo]

https://www.softether.org/4-docs/2-howto
But based on your scant info you may not need a VPN, just use VNC or similar.