无法连接到远程 mongodb 服务器

我正在try 创建一个远程mongodb服务器，用于我的java项目.

我正在使用vagrant+ansible来创建环境，但由于某种原因，我无法获得连接.

我总是被网络拒绝连接.localhost上的相同代码可以完美地工作.

我用的是 vagrant 盒子:chef/centos-6.5

我的主要任务如下:

- name: Download EPEL Repo
  get_url: url=http://dl.fedoraproject.org/pub/epel/6/x86_64/epel- release-6-8.noarch.rpm dest=/tmp/epel-release-6-8.noarch.rpm
- name: Install EPEL Repo
  command: rpm -ivh /tmp/epel-release-6-8.noarch.rpm creates=/etc/yum.repos.d/epel.repo
- name: Install libselinux-python
  yum: name=libselinux-python
- name: Create the repository for 10Gen  
  copy: src=10gen.repo.j2 dest=/etc/yum.repos.d/10gen.repo
- name: Create the EPEL Repository.
  copy: src=epel.repo.j2 dest=/etc/yum.repos.d/epel.repo
- name: Create the GPG key for EPEL
  copy: src=RPM-GPG-KEY-EPEL-6 dest=/etc/pki/rpm-gpg
- name: Create the mongod user
  user: name=mongod comment="MongoD"
- name: Create the data directory for the namenode metadata
  file: path={{ mongodb_datadir_prefix }} owner=mongod group=mongod state=directory
- name: Install the mongodb package
  yum: name={{ item }} state=installed
  with_items:
   - libselinux-python
   - mongo-10gen
   - mongo-10gen-server
   - bc
   - python-pip
- name: Install the latest pymongo package
  pip: name=pymongo state=latest use_mirrors=no 

我添加了iptables例外:

sudo iptables -A INPUT -p tcp --dport 27017 -j ACCEPT

它处于活动状态:

[root@localhost ~]# iptables -L -v
Chain INPUT (policy ACCEPT 209 packets, 13148 bytes)
 pkts bytes target     prot opt in     out     source               destination
 1070 68777 ACCEPT     tcp  --  any    any     anywhere             anywhere            tcp dpt:27017

我的java代码定义MongoDbFactory

public @Bean
MongoDbFactory mongoDbFactory() throws Exception {
    MongoClient mongo = new MongoClient("<ip-of-machine>", 27017);
    return new SimpleMongoDbFactory(mongo, "test");
}

但当我try 连接到它时，总是会遇到以下异常.

com.mongodb.MongoTimeoutException: Timed out after 10000 ms while waiting for a server that matches AnyServerSelector{}. Client view of cluster state is {type=Unknown, servers=[{address=192.168.1.11:27017, type=Unknown, state=Connecting, exception={com.mongodb.MongoException$Network: Exception opening the socket}, caused by {java.net.ConnectException: Connection refused}}]

如果我从localhost运行mongodb并相应地更改ip，一切都会正常工作.

谢谢