nodejs dual tcp server to pass data between ports

nodeDualTcp.js

var net = require('net');
var guestsA = [];
var guestsB = [];

var serverA = net.createServer(function (socket) {
  //socket.write("Echo server\r\n");
  //socket.pipe(socket);
});


serverA.on('connection',function(socket){
    socket.write('hello there\r\n');
    console.log('num of connections on port 1337: ' + serverA.connections);
    
    guestsA.push(socket);
    
    socket.on('data',function(data){
        console.log('received on 1337:'+data);
        socket.write('msgreceived\r\n');
        
        //send data to guest on port 1338
        for (g in guestsB) {
            guestsB[g].write(data);
        }
    })
})
serverA.listen(1337);




var serverB = net.createServer(function (socket) {
  socket.write("Server started\r\n");
  //socket.pipe(socket);
});
serverB.on('connection',function(socket){
    console.log('num of connections on port 1338: ' + serverB.connections);
    
    guestsB.push(socket);
    
    socket.on('data',function(data){
        console.log('received on 1338:'+data);
        
        //send data to guest on port 1337
        for (g in guestsA) {
            guestsA[g].write("from B:" + data);
        }
        
    });
    
   
})
serverB.listen(1338);