I would like to connect AWS DocumentDB locally to NodeJS.

We've tested with ec2 and Cloud9 and I connected to Studio 3t using ec2 ssh tunnel.

And I follow the example of programming connection https://docs.aws.amazon.com/documentdb/latest/developerguide/connect_programmatically.html There is a timeout error locally in NodeJS, so I am asking.

Even if you try to access using .pem file locally in NodeJS, a timeout error occurs and asks.

What is the reason and how can I improve it? I'm sharing the source below.

Thank you in advance

var MongoClient = require('mongodb').MongoClient;
var username = 'DBusername';
var password = 'DBpassword';
var client = MongoClient.connect(
  `mongodb://<DBusername>:<DBpassword>@<clusterendpoint>:27017/<DBname>?tls=true&replicaSet=rs0&readPreference=secondaryPreferred&retryWrites=false`,
  {
    tlsCAFile: `./rds-combined-ca-bundle.pem`,
  },
  function (err, client) {
    if (err) throw err;

    //Specify the database to be used
    db = client.db('DBname');

    //Specify the collection to be used
    col = db.collection('CollectionName');

    //Insert a single document
    col.insertOne({ hello: 'Amazon DocumentDB' }, function (err, result) {
      //Find the document that was previously written
      col.findOne({ hello: 'DocDB;' }, function (err, result) {
        //Print the result to the screen
        console.log(result);

        //Close the connection
        client.close();
      });
    });
  }
);