postgres无法正常连接数据库FATAL: no pg_hba.conf entry for host "192.168.0.69", user "postgres", databa

报错：

Server doesn't listen
The server doesn't accept connections: the connection library reports
could not connect to server: Connection refused (0x0000274D/10061) Is the server running on host "192.168.0.69" and accepting TCP/IP connections on port 5432?
If you encounter this message, please check if the server you're trying to contact is actually running PostgreSQL on the given port. Test if you have network connectivity from your client to the server host using ping or equivalent tools. Is your network / VPN / SSH tunnel / firewall configured correctly?
For security reasons, PostgreSQL does not listen on all available IP addresses on the server machine initially. In order to access the server over the network, you need to enable listening on the address first.
For PostgreSQL servers starting with version 8.0, this is controlled using the "listen_addresses" parameter in the postgresql.conf file. Here, you can enter a list of IP addresses the server should listen on, or simply use '*' to listen on all available IP addresses. For earlier servers (Version 7.3 or 7.4), you'll need to set the "tcpip_socket" parameter to 'true'.
You can use the postgresql.conf editor that is built into pgAdmin III to edit the postgresql.conf configuration file. After changing this file, you need to restart the server process to make the setting effective.
If you double-checked your configuration but still get this error message, it's still unlikely that you encounter a fatal PostgreSQL misbehaviour. You probably have some low level network connectivity problems (e.g. firewall configuration). Please check this thoroughly before reporting a bug to the PostgreSQL community.

在连接postgressql的时候报错了，

解决方法：

1、打开

 

PostgreSQL\8.4\data\pg_hba.conf

2、

双击 第一条

如下图

3、把ip改为你的ip保存即可。（这个地方特别说明下不要直接去打开pg_hba.conf这个文件在里面进行修改，我尝试了几次，效果没有，可能是我版本的原因）

 

4、下面说下地址后面的那个值，是如何确定的

A类的默认子网掩码　255.0.0.0　        一个子网最多可以容纳1677万多台电脑

B类的默认子网掩码　255.255.0.0　   一个子网最多可以容纳6万台电脑

C类的默认子网掩码　255.255.255.0　一个子网最多可以容纳254台电脑

 

把子网掩码切换至二进制，我们会发现，所有的子网掩码是由一串连续的1和一串连续的0组成的（一共4段，每段8位，一共32位数）。

255.0.0.0　11111111.00000000.00000000.00000000            看下 你电脑的子网掩码配置 是这个就写8

255.255.0.0　11111111.11111111.00000000.00000000        看下 你电脑的子网掩码配置 是这个就写16

255.255.255.0　11111111.11111111.11111111.00000000     看下 你电脑的子网掩码配置 是这个就写24

 

例如：

我的电脑是255.255.0.0   ip地址192.168.0.69，我就写成192.168.0.69/16即可

 

 下面附上链接成功的图片