How to fix this hostName assign issue below?
server.listen(app.get('port'),"123.xxx.xxx.xxx");//this is my ip ,not ok
//server.listen(app.get('port'),"127.0.0.1");//ok ,can run in webbrowser
console.log("Express server listening on port " + app.get('port'));
console.log(server.address());
events.js:72
throw er; // Unhandled 'error' event
^
Error: listen EADDRNOTAVAIL
at errnoException (net.js:904:11)
at Server._listen2 (net.js:1023:19)
at listen (net.js:1064:10)
at net.js:1146:9
at dns.js:72:18
at process._tickCallback (node.js:419:13)
at Function.Module.runMain (module.js:499:11)
at startup (node.js:119:16)
at node.js:906:3