Question

Can't connect MongoDB via Shared Private Networking

Posted April 14, 2014 7k views
Hi, I've setup a droplet with Shared Private Networking enabled. I've provisioned it with Ubuntu 12.10 x64. Also, I've installed mongodb using 'sudo apt-get install mongodb' command. I tried using mongoose to connect to the mongodb droplet using the default port. It said failed to connect. I used the command below: > var mongoose = require('mongoose'); > mongoose.connect('mongodb://XXX.XXX.XXX.XXX:27017/database'); Things I've tried... 1. Ping the MongoDB droplet from the app droplet. It works. 2. Ran 'mongo' command on the MongoDB droplet. It works. 3. Ran 'sudo netstat -plunt' and saw the mongod process listening on the 27017 port. Any idea what I could try to verify it or what I can do to resolve this? Cheers, Mickey

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

5 answers
Have you ever check your iptables list?
Use $iptables -S to print all the rules of your firewall.
Yes. Here's the list.

-P INPUT ACCEPT
-P FORWARD ACCEPT
-P OUTPUT ACCEPT

Does it means that it accept all ports?
It solved. The bind_ip is set to 127.0.0.1 by default. Need to change it to 0.0.0.0. Cheers.
I also recommend adding an IPTables rule that drops all packets to the MongoDB ports on the eth0 interface:
sudo iptables -A INPUT -p tcp -m tcp -i eth0 --dport 27017 -j DROP

Hi, I am having the same problem. I have added the rule on IPTables and also set the bind_ip to 0.0.0.0 but always fail to connect.

What else do I need to check to pinpoint the problem?

Submit an Answer