MongoDB with Authentication

Question

I am trying to get MongoDB running on my localhost (Windows) with authentication.

To do so, I first have to add a user, right? I did so by starting the daemon using this command:

C:\[…]\mongod.exe -f C:\[…]\mongo.config

mongo.config contains the following:

# Basic database configuration
dbpath = C:\[…]\db\
bind_ip = 127.0.0.1
port = 20571

# Security
noauth = true

# Administration & Monitoring
nohttpinterface = true

After that I connected via this command:

C:\[…]\mongo.exe --port 20571 127.0.0.1

There I added a user:

> use admin
switched to db admin
> db.addUser('test', 'test')
{ "n" : 0, "connectionId" : 1, "err" : null, "ok" : 1 }
{
    "user" : "test",
    "readOnly" : false,
    "pwd" : "a6de521abefc2fed4f5876855a3484f5",
    "_id" : ObjectId("50db155e157524b3d2195278")
}

To check if everything worked I did the following:

> db.system.users.find()
{ "_id" : ObjectId("50db155e157524b3d2195278"), "user" : "test", "readOnly" : false, "pwd" : "a6de521abefc2fed4f5876855a3484f5" }

Which seemed OK to me.

After that I changed "noauth = true" to "auth = true" in the mongo.config file and restarted the daemon.

Now I expected to be able to connect with user and password:

C:\[…]\mongo.exe --port 20571 -u test -p test 127.0.0.1

Which denied access to me with this message:

MongoDB shell version: 2.0.4
connecting to: 127.0.0.1:20571/127.0.0.1
Wed Dec 26 16:24:36 uncaught exception: error { "$err" : "bad or malformed command request?", "code" : 13530 }
exception: login failed

So here's my question: Why does the login fail?

I can still connect without providing user and password, but can't access any data because "unauthorized db:admin lock type:-1 client:127.0.0.1". Which is actually what I expected.

--host 127.0.0.1 instead of plain 127.0.0.1 or don't specify the host part, since mongo will connect to localhost by default — Andrei Sfat
– Andrei Sfat, Commented Dec 27, 2012 at 13:04
C:\[…]\mongo.exe --port 20571 -u test -p test --host 127.0.0.1 gets me another error: MongoDB shell version: 2.0.4 connecting to: 127.0.0.1:20571/test Thu Dec 27 14:07:06 uncaught exception: login failed exception: login failed — dave
– dave, Commented Dec 27, 2012 at 13:06
try doing: use admin db.auth('test','test'), additionally to the db.addUser(...) because you added the user, but not giving any auth privileges — Andrei Sfat
– Andrei Sfat, Commented Dec 27, 2012 at 13:18
restarted db with auth = false, executed what you suggested, restarted with auth = true, can't connect. Same error as in my comment above. — dave
– dave, Commented Dec 27, 2012 at 13:24
try doing: use test and then db.addUser('test',test) and restart the mongo instance and try to connect to it with --auth — Andrei Sfat
– Andrei Sfat, Commented Dec 27, 2012 at 13:30

dave · Accepted Answer · 2012-12-27 20:09:15Z

2

As Andrei Sfat told me in the comments on the question I made 2 major errors.

First, I thought I could pass the IP to the Client as a simple argument. But you have to use --host for that. Instead, the parameter I thought was the IP address actually should be the db name. So the correct command to connect to a Server is as follows:

C:\[…]\mongo.exe --port 20571 -u test -p test --host 127.0.0.1 admin

Second, users are per database. As I only added the user "test" to the db "admin", it only works there.

answered Dec 27, 2012 at 20:09

dave

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coderLMN · Accepted Answer · 2012-12-27 18:00:47Z

0

Obviously the auth = true configuration wasn't load successfully. Did you forget the -f paramter when you restart the mongod.exe?

C:\[…]\mongod.exe -f C:\[…]\mongo.config

answered Dec 27, 2012 at 18:00

coderLMN

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1 Comment

dave Over a year ago

The configuration was loaded successfully. See comments under my question. Sorry for not marking it as solved.

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