Firefox 跟 Chrome支持WebRTC可以向STUN服务器请求，返回内外网IP，不同于XMLHttpRequest请求，STUN请求开发者工具当中看不到网络请求的。
https://github.com/diafygi/webrtc-ips文章源自运维生存时间-https://www.ttlsa.com/web/get-local-and-public-ip-by-webrtc-ips/
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<h4>
Demo for:
<a href="https://github.com/diafygi/webrtc-ips">
https://github.com/diafygi/webrtc-ips
</a>
</h4>
<p>
This demo secretly makes requests to STUN servers that can log your
request. These requests do not show up in developer consoles and
cannot be blocked by browser plugins (AdBlock, Ghostery, etc.).
</p>
<h4>Your local IP addresses:</h4>
<ul></ul>
<h4>Your public IP addresses:</h4>
<ul></ul>
<h4>Your IPv6 addresses:</h4>
<ul></ul>
<iframe id="iframe" sandbox="allow-same-origin" style="display: none"></iframe>
<script>
//get the IP addresses associated with an account
function getIPs(callback){
var ip_dups = {};
//compatibility for firefox and chrome
var RTCPeerConnection = window.RTCPeerConnection
|| window.mozRTCPeerConnection
|| window.webkitRTCPeerConnection;
var useWebKit = !!window.webkitRTCPeerConnection;
//bypass naive webrtc blocking using an iframe
if(!RTCPeerConnection){
//NOTE: you need to have an iframe in the page right above the script tag
//
//<iframe id="iframe" sandbox="allow-same-origin" style="display: none"></iframe>
//<script>...getIPs called in here...
//
var win = iframe.contentWindow;
RTCPeerConnection = win.RTCPeerConnection
|| win.mozRTCPeerConnection
|| win.webkitRTCPeerConnection;
useWebKit = !!win.webkitRTCPeerConnection;
}
//minimal requirements for data connection
var mediaConstraints = {
optional: [{RtpDataChannels: true}]
};
var servers = {iceServers: [{urls: "stun:stun.services.mozilla.com"}]};
//construct a new RTCPeerConnection
var pc = new RTCPeerConnection(servers, mediaConstraints);
function handleCandidate(candidate){
//match just the IP address
var ip_regex = /([0-9]{1,3}(\.[0-9]{1,3}){3}|[a-f0-9]{1,4}(:[a-f0-9]{1,4}){7})/
var ip_addr = ip_regex.exec(candidate)[1];
//remove duplicates
if(ip_dups[ip_addr] === undefined)
callback(ip_addr);
ip_dups[ip_addr] = true;
}
//listen for candidate events
pc.onicecandidate = function(ice){
//skip non-candidate events
if(ice.candidate)
handleCandidate(ice.candidate.candidate);
};
//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(){});
//wait for a while to let everything done
setTimeout(function(){
//read candidate info from local description
var lines = pc.localDescription.sdp.split('\n');
lines.forEach(function(line){
if(line.indexOf('a=candidate:') === 0)
handleCandidate(line);
});
}, 1000);
}
//insert IP addresses into the page
getIPs(function(ip){
var li = document.createElement("li");
li.textContent = ip;
//local IPs
if (ip.match(/^(192\.168\.|169\.254\.|10\.|172\.(1[6-9]|2\d|3[01]))/))
document.getElementsByTagName("ul")[0].appendChild(li);
//IPv6 addresses
else if (ip.match(/^[a-f0-9]{1,4}(:[a-f0-9]{1,4}){7}$/))
document.getElementsByTagName("ul")[2].appendChild(li);
//assume the rest are public IPs
else
document.getElementsByTagName("ul")[1].appendChild(li);
});
</script>
</body>
</html>
不管你经过了多少次代理，不管你网络情况是如何的复杂，都能获取到你真实的出口IP地址的。只支持chrome和Firefox浏览器。文章源自运维生存时间-https://www.ttlsa.com/web/get-local-and-public-ip-by-webrtc-ips/
文章源自运维生存时间-https://www.ttlsa.com/web/get-local-and-public-ip-by-webrtc-ips/
文章源自运维生存时间-https://www.ttlsa.com/web/get-local-and-public-ip-by-webrtc-ips/
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