Question

I have the following node.js server running on 172.16.1.218:

var net=require('net');

var server = net.createServer(function (socket) {
        socket.write("Echo server\r\n");
        socket.pipe(socket);
});
server.listen(6001, "172.16.1.218");

I can telnet into it and it echos as expected.

I have the following node.js server running on 172.16.1.224:

var net = require('net');

var server = net.createServer(function (socket) {

  // Every time someone connects, tell them hello and then close the connection.
  socket.addListener("connect", function () {
    sys.puts("Connection from " + socket.remoteAddress);
    socket.end("Hello World\n");
  });

});

// Fire up the server bound to port 7000 on localhost
server.listen(6001,"172.16.1.218");

But when I try to run it, I get the following error:

node.js:134
        throw e; // process.nextTick error, or 'error' event on first tick
        ^
Error: EADDRNOTAVAIL, Cannot assign requested address
    at Server._doListen (net.js:1100:5)
    at net.js:1071:14
    at Object.lookup (dns.js:159:5)
    at Server.listen (net.js:1065:20)
    at Object.<anonymous> (/home/hynese/Desktop/test.js:16:8)
    at Module._compile (module.js:402:26)
    at Object..js (module.js:408:10)
    at Module.load (module.js:334:31)
    at Function._load (module.js:293:12)
    at Array.<anonymous> (module.js:421:10)

I’ve turned off all firewalls, etc. I can’t make any sense of this error. Hoping someone can help.

Many thanks in advance,

Answer 1

On 172.16.1.224 you cannot listen on 172.16.1.218 because that’s not the IP of the machine you’re listening on.

If you want to listen on that machine, use:

server.listen(6001,"172.16.1.224");