MongoDB bind ip - mongodb

Question

I want to allow specific IP addres to comunicate with the mongoDB that I have in a server. In order to do that, I opened mongod.conf and edited as follows:
net :
port: 27017
bindIp: localhost,<IpAdres>
security:
authorization: enable
I tried with authorization 'enable' but the only wait it works is as the initial configuration:
net :
port: 27017
bindIp: localhost
#security:
# authorization: enable
Also If I set
net :
port: 27017, <IpAdress>
bindIp: localhost
#security:
# authorization: enable
The error I got is:
Job for mongod.service failed because the control process exited with error code. See "systemctl status mongod.service" and "journalctl -xe" for details.
My goal is to only allow a specific set of IP ADDRES to comunicate with the mongo on my server (comunicate = make consults)
Version: 4.0.18 Running on RedHat 7.8
netstat looks like this
Proto | Recv-Q |Send-Q | Local Address | Foreign Address | State | PID/Program name
tcp | 0 | 0 |127.0.0.1:27017 | 0.0.0.0:* | LISTEN | -

Answer 1

You don´t need enable authentication:
net:
port: 27017
bindIp: localhost, <YOUR_IP>
It is correct, probably you have another communication issue, check your ip/port allows traffic.
Command 'netstat -tulnp' can help you.
https://docs.mongodb.com/manual/reference/configuration-options/
Anyway, the error could be caused by other third reason, go to /run/mongodb folder and deleted the file called mongod.pid. Then try to restart the mongo using:
sudo service mongod restart