Out of the box, MongoDB doesn’t allow remote connections, because by default it has no authentication enabled and is listening on localhost only.
If you try to connect to MongoDB without remote access being allowed, you will get this error:
Error: couldn’t connect to server $MongoDB:$Port, connection attempt failed:SocketException: Error connecting to $MongoDB:$Port :: caused by :: Connection refused … exception: connect failed
In this article i will show how to allow remote access to MongoDB.
Allow Remote Access to MongoDB
By default, MongoDB is listening on 127.0.0.1:27017 only:
$ sudo netstat -tnlp 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 1106/mongod
Open MongoDB configuration file /etc/mongod.conf and change bindIp by adding required LAN interfaces or configure it to bind to all interfaces, for example:
# network interfaces net: port: 27017 bindIp: 127.0.0.1,192.168.0.100 # Enter 0.0.0.0,:: to bind to all interfaces
Restart mongod to apply modifications:
$ sudo service mongod restart
Now mongod is listening on configured interfaces and can be accessible remotely:
$ sudo netstat -tnlp 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 19757/mongod tcp 0 0 192.168.0.100:27017 0.0.0.0:* LISTEN 19757/mongod
Source: https://www.shellhacks.com/mongodb-allow-remote-access/