MongoDB Authentication example

This guide shows you how to enable authentication in MongoDB. The authentication is disabled by default. To configure it, you must first add a user to the “admin” database.

> show dbs
admin  #add single user to this database
Users with normal access in “admin” database, HAVE read and write access to all the other databases. Users with read only access to the “admin” database HAVE only read to all databases.

P.S This example is using MongoDB version 2.2.3

Authentication example

See a full example to add a “admin” user to the admin database, and a normal user to the “testdb” database, and how to perform the authentication.

Terminal 1 – Start MongoDB in secure mode, authentication is required.
$mongo --auth
Terminal 2 – MongoDB client, see comment “#” for self-explanatory
$ mongo
MongoDB shell version: 2.2.3
connecting to: test
> use admin             		#1. connect to the "admin" database.
switched to db admin			
> db.addUser("admin","password")	#2. add a user "admin" to the admin database. 
	"user" : "admin",
	"readOnly" : false,
	"pwd" : "90f500568434c37b61c8c1ce05fdf3ae",
	"_id" : ObjectId("513af8cac115e7a6b4bcceb9")
addUser succeeded, but cannot wait for replication since we no longer have auth
> use testdb				#3. connect to the "testdb" database.
switched to db testdb
> show collections			#4. now, read and write need authentication
Sat Mar  9 16:54:57 uncaught exception: error: {
	"$err" : "unauthorized db:testdb ns:testdb.system.namespaces lock type:0 client:",
	"code" : 10057
> use admin				#5. connect back to the "admin" database.
switched to db admin
> db.auth("admin","password")		#6. performs authentication, 1 means succeed, 0 means failed
> use testdb				#7. connect to the "testdb" database.
switched to db testdb
> show collections			#8. no problem, it shows all collections
> db.addUser("testdb","password")       #9. add another user "testdb" to the "testdb" database.
	"user" : "testdb",
	"readOnly" : false,
	"pwd" : "b9ff75cbf18bd98d8554efec12c72090",
	"_id" : ObjectId("513af934c115e7a6b4bcceba")
> show collections
system.users				#10. All users' data are stored in this system.users collection.
> db.system.users.find()
{ "_id" : ObjectId("513af934c115e7a6b4bcceba"), "user" : "testdb", "readOnly" : false, "pwd" : "b9ff75cbf18bd98d8554efec12c72090" }



  1. MongoDB : Security Practices and Management
  2. Java MongoDB authentication example

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