FROM:http://zone.wooyun.org/content/18274

from:https://github.com/diafygi/webrtc-ips

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。

测试链接

js复制
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//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 mediaConstraints = {
        optional: [{RtpDataChannels: true}]
    };
    //firefox already has 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(){});
}
//Test: Print the IP addresses into the console
getIPs(function(ip){console.log(ip);});