首先，要确保它不是防火墙问题，请在两台服务器上都停止IPTABLES(不要忘了以后重新启用).

Firstly, To ensure its not a firewall issue, stop IPTABLES on both servers (don't forget to re-enable afterwards).

在您要连接的计算机上，直接SSH到它并确保MongoDB在运行，在本地连接并检查您是否可以访问数据库.

On the machine that you are trying to connect to, ssh directly to it and ensure MongoDB is running, Connect locally and check that you can access a DB.

默认情况下，

MongoDb未配置为接受来自远程主机的连接，请确保您在/etc/mongodb.conf文件中包含以下行:

MongoDb isn't configured to accept connections from remote hosts by default, could you ensure you have these lines in your /etc/mongodb.conf file:

bind_ip = 0.0.0.0
port = 27017

确保在进行任何更改后重新启动MongoDB.尝试此操作，如果您仍然遇到问题，请发表评论，我会用更多建议来更新答案.

Make sure you restart MongoDB after making any changes. Try this and comment if your still having issues and I'll update the answer with more suggestions.

编辑:从2.6版开始，配置文件格式已更改为YAML，详细信息此处，文件应位于/etc/mongod.conf.

As of version 2.6 the config file format has changed to YAML, details here, the file should be located at /etc/mongod.conf.

net:
   bindIp: 0.0.0.0
   port: 27017