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Editorial Team
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Asked: 2026-06-18T07:30:31+00:00

I setup the VPC as described here: http://docs.amazonwebservices.com/AmazonVPC/latest/UserGuide/VPC_Scenario2.html And I have a box in

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I setup the VPC as described here: http://docs.amazonwebservices.com/AmazonVPC/latest/UserGuide/VPC_Scenario2.html

And I have a box in the private subnet, that I want to use as a mongo box. The private IP is 10.0.1.51.

I can connect to mongod instance over localhost, but not over the private IP:

ubuntu@ip-10-0-1-51:~$ mongo localhost
connecting to: localhost
> this works

> ^Cubuntu@ip-10-0-1-51:~$ mongo 10.0.1.51
Fri Sep 21 02:23:18 Error: couldn't connect to server 10.0.1.51 shell/mongo.js:81
exception: connect failed
ubuntu@ip-10-0-1-51:~$

The security group allows incoming and outgoing port 27017.

The route table has 

10.0.0.0/16 local

entry.

What am I missing?

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1 Answer

  1. Editorial Team

    The problem was actually in mongodb config, not the routing tables. MongoDB, like MySQL, needs to allow connections from a specific host.

    In mongodb.conf:

    bind_ip = <%= @bind_ip || '127.0.0.1' %>
port = <%= @port || '27017' %>

    Where @bind_ip and @port are the IP and port of your server as it appears to the client nodes.

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