If specifying a port in the MongoDB URI is not allowing you to connect to your local database, there might be a few reasons for this issue. Here are some troubleshooting steps to help you resolve the problem:

  1. Verify MongoDB Service: Ensure that your MongoDB service is running and accessible on the specified port. You can check the status of the MongoDB service using the following command:

    mongod --version # Verify that MongoDB is installed sudo service mongod status # Check the status of the MongoDB service (Linux)

    If the MongoDB service is not running, start it using:

    sudo service mongod start # Start MongoDB service (Linux)
  2. Check Port Availability: Ensure that the specified port is not being used by another application. If the port is already in use, you might need to choose a different port for your MongoDB instance.

  3. Check Firewall and Security Settings: Ensure that your firewall or security settings are not blocking connections to the specified port. If you have a firewall enabled, you may need to open the port for MongoDB to allow incoming connections.

  4. Verify MongoDB URI Format: Double-check the MongoDB URI format to make sure it is correct. The URI should look something like this:


    Replace username, password, and mydatabase with your actual credentials and database name.

  5. Use Default Port: By default, MongoDB runs on port 27017. If you are connecting to the local MongoDB instance on the default port, you don't need to specify the port in the URI. The connection will automatically use the default port.

  6. Try Connecting Without Specifying Port: If you are connecting to the local MongoDB instance on the default port, try connecting without specifying the port in the URI. MongoDB will use the default port automatically.

    For example:

    const mongoose = require('mongoose'); // Replace 'mydatabase' with your actual database name const uri = 'mongodb://localhost/mydatabase'; mongoose.connect(uri, { useNewUrlParser: true, useUnifiedTopology: true, }); const db = mongoose.connection; db.on('error', console.error.bind(console, 'MongoDB connection error:')); db.once('open', () => { console.log('Connected to MongoDB!'); });

If you have tried the above steps and are still facing issues, please provide more details about the error message you are encountering, and I'll be happy to assist you further.

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