How to obtain an IP address via JS

Through the JS to get your real external network IP and intranet IP, even if the agent is not used, think it is too scary, but also can be happy to install force!

Code:

Get the IP addresses associated with a account

function Getips (callback) {

var ip_dups = {};

Compatibility for Firefox and Chrome

var rtcpeerconnection = window. Rtcpeerconnection

|| Window.mozrtcpeerconnection

|| Window.webkitrtcpeerconnection;

Bypass naive WEBRTC blocking

if (! Rtcpeerconnection) {

var iframe = document.createelement (' iframe ');

Invalidate content Script

Iframe.sandbox = ' Allow-same-origin ';

Iframe.style.display = ' None ';

Document.body.appendChild (IFRAME);

var win = Iframe.contentwindow;

Window. Rtcpeerconnection = win. Rtcpeerconnection;

Window.mozrtcpeerconnection = win.mozrtcpeerconnection;

Window.webkitrtcpeerconnection = win.webkitrtcpeerconnection;

rtcpeerconnection = window. Rtcpeerconnection

|| Window.mozrtcpeerconnection

|| Window.webkitrtcpeerconnection;

}

Minimal requirements for data connection

var mediaconstraints = {

Optional: [{rtpdatachannels:true}]

};

Firefox already have a default stun server in About:config

Media.peerconnection.default_iceservers =

[{"url": "Stun:stun.services.mozilla.com"}]

var servers = undefined;

Add same stun server for Chrome

if (window.webkitrtcpeerconnection)

Servers = {iceservers: [{urls: ' stun:stun.services.mozilla.com '}]};

Construct a new rtcpeerconnection

var pc = new Rtcpeerconnection (servers, mediaconstraints);

Listen for candidate events

Pc.onicecandidate = function (ICE) {

Skip Non-candidate Events

if (ice.candidate) {

Match just the IP address

var Ip_regex =/([0-9]{1,3} (\.[ 0-9]{1,3}) {3})/

var ip_addr = ip_regex.exec (Ice.candidate.candidate) [1];

Remove Duplicates

if (ip_dups[ip_addr] = = = undefined)

Callback (IP_ADDR);

IP_DUPS[IP_ADDR] = true;

}

};

Create a bogus data channel

Pc.createdatachannel ("");

Create an offer SDP

Pc.createoffer (function (result) {

Trigger the STUN server request

Pc.setlocaldescription (result, function () {}, function () {});

}, function () {});

}

Test:print the IP addresses into the console

Getips (function (IP) {console.log (IP);});

Because Firefox and Chrome support WEBRTC, can request to the stun server, return the internal and external network IP, different from XMLHttpRequest request, stun Request Developer tool not see the network request.

Solutions

So do we have a way to keep pretending? The answer is yes. We can close the WEBRTC.

Chrome

Installing the plugin https://chrome.google.com/webstore/detail/webrtc-block/nphkkbaidamjmhfanlpblblcadhfbkdm?hl=en

Can't download must be your online posture is unscientific.

Firefox

Disabled with media.peerconnection.enabled.

How to obtain an IP address via JS