MongoDB Failed to connect to <IP>:<port>, reason: errno:111 Connection refused

使用账户密码连接到指定服务器的数据库：

# mongo 192.168.1.11/mydb -u userkk -p userkk

redhat连接[b]本地mongodb错误如下：[/b]

[root@localhost ~]# mongo 192.168.1.11/mydb -u userkk -p userkk
MongoDB shell version: 3.0.2
connecting to: 192.168.1.11/mydb
2015-05-11T06:26:54.981-0700 W NETWORK  Failed to connect to 192.168.1.11:27017, reason: errno:111 Connection refused
2015-05-11T06:26:54.983-0700 E QUERY    Error: couldn't connect to server 192.168.1.11:27017 (192.168.1.11), connection attempt failed
    at connect (src/mongo/shell/mongo.js:181:14)
    at (connect):1:6 at src/mongo/shell/mongo.js:181
exception: connect failed
[root@localhost ~]#

Windows连接到redhat的mongodb错误如下：

C:\Documents and Settings>mongo 192.168.1.11/mydb -u userkk -p userkk
MongoDB shell version: 2.6.5
connecting to: 192.168.1.11/mydb
2015-05-11T21:31:15.433+0800 warning: Failed to connect to 192.168.1.11:27017, reason: errno:10061
由于目标机器积极拒绝，无法连接。
2015-05-11T21:31:15.433+0800 Error: couldn't connect to server 192.168.1.11:27017 (192.168.1.11), 
connection attempt failed at src/mongo/shell/mongo.js:148
exception: connect failed

原因：端口为绑定为服务器IP（192.168.1.11）

解决：

服务器端更改绑定IP，重启服务。

[root@localhost ~]# vi /etc/mongod.conf

bind_ip=127.0.0.1

改为：

bind_ip=192.168.1.11

[root@localhost ~]# service mongod restart

此时，redhat 连接本地 mongodb 正常；

但是，Windows 连接到 redhat 的 mongodb 错误；

错误如下：

C:\Documents and Settings>mongo 192.168.1.11/mydb -u userkk -p userkk
MongoDB shell version: 2.6.5
connecting to: 192.168.1.11/mydb
2015-05-11T21:48:06.542+0800 Error: 18 { ok: 0.0, errmsg: "auth failed", code: 18 } 
at src/mongo/shell/db.js:1210
exception: login failed

看网上说是版本不同，我这是2.6.5，要连接的服务端是3.0.2 。

因为两版本的差异也是较大了，估计是这问题吧。百度谷歌也找不到更好的解释了。

如果 bing_ip 不是127.0.0.1 ，则连接到mongodb时，须指定IP地址，否则拒接访问