Nodejs mysql ECONNREFUSED在连接到网络中另一个IP地址的服务器时

Question

更新：This解决了问题！结果我忘了解除MySQL本地主机地址的绑定。

我正在尝试连接到运行在同一网络但与其他设备不同的IP地址的MySQL服务器。来自localhost的连接有效。

extern"C"
void *malloc(size_t){
    return (void*)(0);
}

extern"C"
void free(void*){};


// C++ mini-definition of new & delete and aeabi_atexit:
void* operator new(size_t size, const std::nothrow_t& nothrow_value)throw(){
    return malloc(size);
}

void* operator new(size_t size) {
    return malloc(size);
}

void operator delete(void* p) throw(){
    free(p);
}


extern"C"
int __aeabi_atexit(void*,void(*)(void*),void*){
    return 0;
}

错误：

var connection = mysql.createConnection({
  host     : '172.16.3.170',
  port     : 3306,
  user     : 'root',
  password : '',
  database : 'owen_pm'
});

输出“ps ax | grep mysqld”

{ Error: connect ECONNREFUSED 172.16.3.170:3306
    at Object.exports._errnoException (util.js:1022:11)
    at exports._exceptionWithHostPort (util.js:1045:20)
    at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1087:14)
    --------------------
    at Protocol._enqueue (/home/pi/pmsensor/node_modules/mysql/lib/protocol/Protocol.js:141:48)
    at Protocol.handshake (/home/pi/pmsensor/node_modules/mysql/lib/protocol/Protocol.js:52:41)
    at Connection.connect (/home/pi/pmsensor/node_modules/mysql/lib/Connection.js:130:18)
    at query (/home/pi/pmsensor/test.js:50:14)
    at Object.<anonymous> (/home/pi/pmsensor/test.js:86:1)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
  code: 'ECONNREFUSED',
  errno: 'ECONNREFUSED',
  syscall: 'connect',
  address: '172.16.3.170',
  port: 3306,
  fatal: true }

提前致谢！

更新：This解决了问题！结果我忘了解除MySQL本地主机地址的绑定。