I have a website where I want to know the local IP address of clients that are accessing my website from within the LAN. There already exists such a website in our network but the owner refuses to reveal the technology as of now. So I know it is possible. I've already looked here. This question demands to know the local IP from outside the network, which has its own limitations. However I want to know how to do it everytime if both client and server are in same LAN (without depending on the client's browser to support WebRTC).
Additional info: I use nginx on my server and my backend runs on node.js Thanks in advance. :D
