Get local IP address in node.js

I have a simple node.js program running on my machine and I want to get local IP address of PC on which my program is running. How do I get it with node.js?

'use strict';

var os = require('os');
var ifaces = os.networkInterfaces();

Object.keys(ifaces).forEach(function (ifname) {
  var alias = 0;

  ifaces[ifname].forEach(function (iface) {
    if ('IPv4' !== iface.family || iface.internal !== false) {
      // skip over internal (i.e. 127.0.0.1) and non-ipv4 addresses
      return;
    }

    if (alias >= 1) {
      // this single interface has multiple ipv4 addresses
      console.log(ifname + ':' + alias, iface.address);
    } else {
      // this interface has only one ipv4 adress
      console.log(ifname, iface.address);
    }
    ++alias;
  });
});

// en0 192.168.1.101
// eth0 10.0.0.101

Get local external ip address with nodejs · GitHub, ,os = require('os') ,ifaces = os. networkInterfaces(); for (var dev in ifaces) { var iface = ifaces[dev]. filter(function(details) { return details. family === 'IPv4' && details. internal === false; }); if(iface. length > 0) address = iface[0]. address; console. log(address); I wrote a Node.js module that determines your local IP address by looking at which network interface contains your default gateway. This is more reliable than picking an interface from os.networkInterfaces() or DNS lookups of the hostname. It is able to ignore VMware virtual interfaces, loopback, and VPN interfaces, and it works on Windows, Linux, Mac OS, and FreeBSD.

os.networkInterfaces as of right now doesn't work on windows. Running programs to parse the results seems a bit iffy. Here's what I use.

require('dns').lookup(require('os').hostname(), function (err, add, fam) {
  console.log('addr: '+add);
})

This should return your first network interface local ip.

local-ip, IP. IP address utilities for node.js Get your ip address, compare ip addresses, validate ip addresses, etc. var ip = require('ip');. ip.address()  How to Get User’s IP Address in Node JS. According to Nodejs Documentation, to get the IP address, they suggest following method: var ip = req.connection.remoteAddress; But, there is a catch, if your Node app running on NGINX or any other proxy for that matter, then you will get the local ip address for every request i.e, 127.0.0.1.

https://github.com/indutny/node-ip

var ip = require("ip");
console.dir ( ip.address() );

ip, I have a simple nodejs program running on my machine and I want to get local IP address of PC on which is my program running How do I ge GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Sign up A very simple way to get local ip address from localhost with Node JS

Any IP of your machine you can find by using the os module - and that's native to NodeJS

var os = require( 'os' );

var networkInterfaces = os.networkInterfaces( );

console.log( networkInterfaces );

All you need to do is call os.networkInterfaces() and you'll get an easy manageable list - easier than running ifconfig by leagues

http://nodejs.org/api/os.html#os_os_networkinterfaces

Best

Edoardo

Get local IP address in node.js, 'connection'; Event: 'error'; Event: 'listening'; server.address(); server.close([​callback]) On Unix, the local domain is also known as the Unix domain. system if listening on an IP socket (useful to find which port was assigned when getting  Get local ip address in node. Contribute to eiriksm/node-local-ip development by creating an account on GitHub.

Here is a snippet of node.js code that will parse the output of ifconfig and (asynchronously) return the first IP address found:

(tested on MacOS Snow Leopard only; hope it works on linux too)

var getNetworkIP = (function () {
    var ignoreRE = /^(127\.0\.0\.1|::1|fe80(:1)?::1(%.*)?)$/i;

    var exec = require('child_process').exec;
    var cached;    
    var command;
    var filterRE;

    switch (process.platform) {
    // TODO: implement for OSs without ifconfig command
    case 'darwin':
         command = 'ifconfig';
         filterRE = /\binet\s+([^\s]+)/g;
         // filterRE = /\binet6\s+([^\s]+)/g; // IPv6
         break;
    default:
         command = 'ifconfig';
         filterRE = /\binet\b[^:]+:\s*([^\s]+)/g;
         // filterRE = /\binet6[^:]+:\s*([^\s]+)/g; // IPv6
         break;
    }

    return function (callback, bypassCache) {
         // get cached value
        if (cached && !bypassCache) {
            callback(null, cached);
            return;
        }
        // system call
        exec(command, function (error, stdout, sterr) {
            var ips = [];
            // extract IPs
            var matches = stdout.match(filterRE);
            // JS has no lookbehind REs, so we need a trick
            for (var i = 0; i < matches.length; i++) {
                ips.push(matches[i].replace(filterRE, '$1'));
            }

            // filter BS
            for (var i = 0, l = ips.length; i < l; i++) {
                if (!ignoreRE.test(ips[i])) {
                    //if (!error) {
                        cached = ips[i];
                    //}
                    callback(error, ips[i]);
                    return;
                }
            }
            // nothing found
            callback(error, null);
        });
    };
})();

Usage example:

getNetworkIP(function (error, ip) {
    console.log(ip);
    if (error) {
        console.log('error:', error);
    }
}, false);

If the second parameter is true, the function will exec a system call every time; otherwise the cached value is used.


Updated version

Returns an array of all local network addresses.

Tested on Ubuntu 11.04 and Windows XP 32

var getNetworkIPs = (function () {
    var ignoreRE = /^(127\.0\.0\.1|::1|fe80(:1)?::1(%.*)?)$/i;

    var exec = require('child_process').exec;
    var cached;
    var command;
    var filterRE;

    switch (process.platform) {
    case 'win32':
    //case 'win64': // TODO: test
        command = 'ipconfig';
        filterRE = /\bIPv[46][^:\r\n]+:\s*([^\s]+)/g;
        break;
    case 'darwin':
        command = 'ifconfig';
        filterRE = /\binet\s+([^\s]+)/g;
        // filterRE = /\binet6\s+([^\s]+)/g; // IPv6
        break;
    default:
        command = 'ifconfig';
        filterRE = /\binet\b[^:]+:\s*([^\s]+)/g;
        // filterRE = /\binet6[^:]+:\s*([^\s]+)/g; // IPv6
        break;
    }

    return function (callback, bypassCache) {
        if (cached && !bypassCache) {
            callback(null, cached);
            return;
        }
        // system call
        exec(command, function (error, stdout, sterr) {
            cached = [];
            var ip;
            var matches = stdout.match(filterRE) || [];
            //if (!error) {
            for (var i = 0; i < matches.length; i++) {
                ip = matches[i].replace(filterRE, '$1')
                if (!ignoreRE.test(ip)) {
                    cached.push(ip);
                }
            }
            //}
            callback(error, cached);
        });
    };
})();
Usage Example for updated version
getNetworkIPs(function (error, ip) {
console.log(ip);
if (error) {
    console.log('error:', error);
}
}, false);

Net, Example. Look up a web address, and write it's IP address: var dns = require('dns​'); var w3 = dns.lookup('w3schools.com', function (err, addresses, family) { Take a look at these questions How can I get the user's IP address using Node.js, Node.js: Get client's IP – The Scrum Meister Nov 28 '13 at 6:01 One second, you want the client IP , or the current machine IP ?

Node.js DNS Module, On NodeJS, you can use a module like geoip-lite or node-where to Note: This won't work if you are localhost , since it needs to get the IP to  The WebRTC API can be used to retrieve the client's local IP. However the browser may not support it, or the client may have disabled it for security reasons. In any case, one should not rely on this "hack" on the long term as it is likely to be patched in the future (see Cullen Fluffy Jennings's answer).

How to Get User's IP Details in ExpressJS, Local IP address: It is the IP address of your computer system which is meant to be kept Instead, we are using a PHP program to get the same job done. Nodejs | authentication using Passportjs and passport-local-mongoose · HTML  node js validate ip address (20) One liner for MAC os first localhost address only. When developing apps on mac os, and want to test it on the phone, and need your app to pick the localhost ip automatically.

How to Get Local IP Address of System using PHP ?, To get the IP of the user from a website even in secured websites with SSL, you can use the ipify service which provides a friendly API to get the user IP easily. This service has no request limitations. You can use it in your project requesting to the API (with the format parameter if you need) and you're ready to go.

Comments
  • food for thought check out joeyh.name/code/moreutils and github.com/polotek/procstreams . I never leave home with out them.
  • Try this: github.com/indutny/node-ip
  • that could use some commenting.
  • var _ = require('underscore'); var ip = _.chain(require('os').networkInterfaces()).flatten().filter(function(val){ return (val.family == 'IPv4' && val.internal == false) }).pluck('address').first().value(); console.log(ip)
  • guess there's an alias++ missing in the inner loop
  • @CarterCole you need an extra call to .values() before flatten.
  • What if I wanted to retrieve just the active interface's IP address?
  • @HermannIngjaldsson: This is not a very thoroughly informative criticism. Could you be more specific? Maybe take the example code and put it into a new question providing more details and asking why it doesn't work?
  • It is not always a good idea to use the DNS lookup, as it can return wrong information (i.e. cached data). Using 'os.networkInterfaces' is a better idea in my opinion.
  • Using DNS works if your server has a dns entry somewhere. However in a lot of applications there isn't a dns entry (e.g. my laptop). os.networkInterfaces() is probably the way to go.
  • Note that this uses the OS lookup, which doesn't necessarily do DNS lookups and should know its own primary IP address...
  • what if i get the DNS address of each interface