Enable MongoDB Access Control

The default data directory for MongoDB is /data/db

This can be overridden by a dbpath option specified on the command line or in a configuration file.

If you install MongoDB via a package manager such as Homebrew or MacPorts these installs typically create a default data directory other than /data/db and set the dbpath in a configuration file.

You can check the dbpath by:


in your mongo shell

 "storage" : {
    "dbPath" : "/usr/local/var/mongodb"

The following procedure first adds a user administrator to a MongoDB instance running without access control and then enables access control.

1.  Start MongoDB without access control.

$ mongod --port 27017 --dbpath /data/db1

2. Connect to the instance.

$ mongo --port 27017

3. Create the user administrator.

In the admin database, add a user with the userAdminAnyDatabase role. For example, the following creates the user myUserAdmin in the admin database:

Note: The database where you create the user (in this example, admin) is the user’s authentication database.

 > db.createUser(
 ...   {
 ...     user: "abhilash",
 ...     pwd: “password!“,
 ...     roles: [ { role: "userAdminAnyDatabase", db: "admin" } ]
 ...   }
 ... ) 

 Successfully added user: {
 "user" : "abhilash",
 "roles" : [
    "role" : "userAdminAnyDatabase",
    "db" : "admin"

Disconnect the mongo shell.

4. Re-start the MongoDB instance with access control.

$ mongod --auth --port 27017 --dbpath /usr/local/var/mongodb/db1

Clients that connect to this instance must now authenticate themselves as a MongoDB user.

 > db.auth();
 Error: auth expects either (username, password) or ({ user: username, pwd: password })
 > db

** To authenticate during connection:

$ mongo --port 27017 -u "abhilash" -p "password!” --authenticationDatabase "admin"

** To authenticate after connecting

Connect the mongo shell

 $ mongo
 > use admin
 > db.auth("abhilash", “password!“ )
 > mongo
 MongoDB shell version v3.4.7
 connecting to: mongodb://
 MongoDB server version: 3.4.7
 Server has startup warnings:
 2018-01-22T10:32:18.027+0530 I CONTROL  [initandlisten]
 2018-01-22T10:32:18.027+0530 I CONTROL  [initandlisten] ** WARNING: Access control is not enabled for the database.
 2018-01-22T10:32:18.027+0530 I CONTROL  [initandlisten] **          Read and write access to data and configuration is unrestricted.
 2018-01-22T10:32:18.027+0530 I CONTROL  [initandlisten]
 > use admin
 switched to db admin
 > db
 > db.auth("abhilash", "password!”);
 > use my_dbname;
 > db.createUser(
     user: "vadmin",
     pwd: “pass111!”,
     roles: [ { role: "readWrite", db: "my_dbname" },
              { role: "read", db: "test" } ]

Reference:  Mongodb enable-authentication 


Author: Abhilash

I'm Abhilash, a web developer who specializes in Ruby development. With years of experience working with various frameworks like Rails, Angular, Sinatra, Laravel, NodeJS, React and more, I am passionate about building robust and scalable web applications. Since 2010, I have been honing my skills and expertise in the Ruby on Rails platform. This blog is dedicated to sharing my knowledge and experience on topics related to Ruby, Ruby on Rails, and other subjects that I have worked with throughout my career. Join me on this journey to explore the exciting world of web development!

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