Connection refused to MongoDB errno 111

Question

I have a Linode server running Ubuntu 12 04 LTS and MongoDB instance  service is running and CAN connect locally  that I can t connect to from an outside source   I have added these two rules to my IP tables  where  lt  ip address   is the server I want to connect FROM  as outlined in this MongoDB reference    iptables -A INPUT -s  lt  ip-address   -p tcp --destination-port 27017 -m state --state NEW ESTABLISHED -j ACCEPT   iptables -A OUTPUT -d  lt  ip-address   -p tcp --source-port 27017 -m state --state ESTABLISHED -j ACCEPT   And I see the rule in my IP table allowing connections on 27017 to and from  lt  ip address   however when I try to connect from    lt  ip address   to my mongo database using a command like this   mongo databasedomain databasename -u username -p password  I get this error   2014-07-22T23 54 03 093 0000 warning  Failed to connect to databaseserverip 27017  reason  errno 111 Connection refused 2014-07-22T23 54 03 094 0000 Error  couldn t connect to server  lt  ip address   27017  databaseserverip   connection attempt failed at src mongo shell mongo js 148 exception  connect failed  Any help is VERY APPRECIATED     Thanks

User · Answer

For me  changing the ownership of  var lib mongodb and  tmp mongodb-27017 sock to mongodb was the way to go  Just do  sudo chown -R mongodb mongodb  var lib mongodb  and then  sudo chown mongodb mongodb  tmp mongodb-27017 sock  and then start or restart the mongodb server  sudo systemctl start mongod  or sudo systemctl restart mongod  and check the status sudo systemctl status mongod

User · Answer

I follow this tutorial s instructions for installation  How to Install MongoDB on Ubuntu 16 04  I had the same mistake  Finally  I found out that I needed to set the port number  The default port number for the mongo command is 27017  But the default port number in mongo conf is 29999

User · Answer

In my case previous version was 3 2  I have upgraded to 3 6 but data files was not compatible to new version so I removed all data files as it was not usable for me and its works   You can check logs using  var log mongodb

User · Answer

One other option is to just repair your database like so  note  db0 directory should be pre-created first    mongod --dbpath  var lib mongodb  --repairpath  var lib mongodb db0   This is also an acceptable option in production environments

User · Answer

This done the trick for me  sudo service mongod restart

User · Answer

I also had the same issue Make a directory in dbpath In my case there wasn t a directory in  data db  So i created one Now its working Make sure to give permission to that directory

User · Answer

I Didn t have a  data db directory  I created one and gave a chmod 777 permission and it worked for me

User · Answer

Thanks for the help everyone   Turns out that it was an iptable conflict   Two rules listing the port open  which resulted in a closed port    However  one of the comments by aka and another by manu2013 were problems that I would have run into  if not for the conflict   So  Always remember to edit the  etc mongod conf file and set your bind ip   0 0 0 0 in order to make connections externally   Also  make sure that you don t have conflicting rules in your iptable for the port mongo wants  see link on mongodb s site to set up your iptables properly

User · Answer

These commands fixed the issue for me    sudo rm  var lib mongodb mongod lock sudo mongod --repair sudo service mongod start sudo service mongod status   If you are behind proxy  use - export http proxy  http   username password company com port   export https proxy  http   username password company com port    Reference  https   stackoverflow com a 24410282 4359237

User · Answer

For Ubuntu Server 15 04 and 16 04 you need execute only this command  sudo apt-get install --reinstall mongodb

User · Answer

Try the following   sudo rm  var lib mongodb mongod lock sudo service mongodb restart

User · Answer

Even though the port is open  MongoDB is currently only listening on the local address 127 0 0 1  To allow remote connections  add your server   s publicly-routable IP address to the mongod conf file   Open the MongoDB configuration file in your editor   sudo nano  etc mongodb conf   Add your server   s IP address to the bindIP value       logappend true  bind ip   127 0 0 1 your server ip  port   27017        Note that now everybody who has the username and password can login to your DB and you want to avoid this by restrict the connection only for specific IP s  This can be done using Firewall  read about UFW service at Google   But in short this should be something like this   sudo ufw allow from YOUR IP to any port 27017

[linux] Connection refused to MongoDB errno 111

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