I would like to set up a very simple node.js web application on raspberry pi and access it remotely, from outside the LAN.
There are no other hosts in that LAN with the Raspberry. I only need to access the web application from single location which has static IP assigned by ISP.
Is it possible to configure a firewall on a basic router with 'deny all, allow x' type of filter, x being my static IP? Also, is this security measure enough?
Please feel free to recommend ways of maximizing the security of my project.