mongodb remote authentication failure Mongod v4 - mongodb

Question

I have recently installed mongodb on one of our windows 2016 server with below configuration and running mongod as
mongod --config C:\mongo_db\config\mongo_db_configuration.conf --auth
--config file
net:
# MongoDB server listening port
#bindIp: 0.0.0.0,192.168.43.250
port: 27017
bindIpAll: true
storage:
# Data store directory
dbPath: "C:\\mongo_db\\db"
mmapv1:
# Reduce data files size and journal files size
smallFiles: true
systemLog:
# Write logs to log file
destination: file
path: "C:\\mongo_db\\logs\\mongodb.log"
security:
authorization: enabled
We have created a root user in admin database
MongoDB Enterprise > db.runCommand({connectionStatus:1})
{
"authInfo" : {
"authenticatedUsers" : [
{
"user" : "root",
"db" : "admin"
}
],
"authenticatedUserRoles" : [
{
"role" : "dbAdminAnyDatabase",
"db" : "admin"
},
{
"role" : "root",
"db" : "admin"
}
]
},
"ok" : 1
}
I am able to connect to the mongod instance locally (mongo --port 27017 -u "root" -p "12345" --authenticationDatabase admin) but getting error while connecting remotely.the server firewall is disabled.
"C:\Mongodb>mongo.exe 192.168.0.171:27017/admin -u root -p 12345
MongoDB shell version v4.0.4
connecting to: mongodb://192.168.0.171:27017/admin
Implicit session: session { "id" : UUID("c68e9dd5-6f7b-4356-bc3e-688a7e2b3e1d") }
MongoDB server version: 4.0.4
2018-11-26T23:50:47.534+0800 E QUERY [js] Error: Authentication failed. :
DB.prototype._authOrThrow#src/mongo/shell/db.js:1685:20
#(auth):6:1
#(auth):1:2
exception: login failed"

Answer 1

I stumbled upon this when I was having the same problem. I was connecting to a MongoDB server version 4.2.6 from a MongoDB shell version v3.6.9. In case anyone else finds this question like I did, here's the syntax that worked:
mongo --host mongodb://username:password#IP:PORT/ --authenticationDatabase admin

Answer 2

I'm also having similar issue with my virtual machines. I have 2 linux and 1 windows machine (which are remotely connected to my windows machine). Let's say Linux A has mongo with credentials. When I try to login from my windows machine, I got the same error that you mention.
However, when I connect mongo from linux B to linux A, I can successfully connect from shell using:
mongo --host 192.168.1.6 --port 27017 -u username -p 'pwd'
I use exact same command from windows as well but somehow it fails to login. Maybe this command could work on your environment but waiting for proper solution as well.