exmaple server to fetch public ip address

server.js

// get your public ip of the subnet
// base code fetch from <https://nodejs.dev/learn/build-an-http-server>
// how to run? : `node ./GetPublicIpAddrServer.js`
const http = require('http')

const port4 = 12345
const port6 = 12346

const svn_fn = (req, res) => {
    res.statusCode = 200
    res.setHeader('Content-Type', 'text/html')
    // content = req.socket.remoteFamily + "|" + req.socket.remoteAddress + "|" + req.socket.remotePort
    content = `${req.socket.remoteAddress}:${req.socket.remotePort}`
    res.end(content)
}

const v4 = http.createServer(svn_fn)
const v6 = http.createServer(svn_fn)

v4.listen(port4,"0.0.0.0", () => {
    console.log(`IPv4 Server running at port ${port4}`)
})
v6.listen(port6, () => {
    console.log(`IPv6 Server running at port ${port6}`)
})