postgres無法正常連接數據庫FATAL: no pg_hba.conf entry for host "192.168.0.69", user "postgres", databa


報錯

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.

在連接postgressql的時候報錯了,

解決方法

1、打開

 

PostgreSQL\8.4\data\pg_hba.conf

2

雙擊 第一條

如下圖

3、把ip改為你的ip保存即可。(這個地方特別說明下不要直接去打開pg_hba.conf這個文件在里面進行修改,我嘗試了幾次,效果沒有,可能是我版本的原因

 

4、下面說下地址后面的那個值,是如何確定的

A類的默認子網掩碼 255.0.0.0         一個子網最多可以容納1677萬多台電腦
B類的默認子網掩碼 255.255.0.0    一個子網最多可以容納6萬台電腦
C類的默認子網掩碼 255.255.255.0 一個子網最多可以容納254台電腦
 
把子網掩碼切換至二進制,我們會發現,所有的子網掩碼是由一串連續的1和一串連續的0組成的(一共4段,每段8位,一共32位數)。
255.0.0.0 11111111.00000000.00000000.00000000            看下 你電腦的子網掩碼配置 是這個就寫8
255.255.0.0 11111111.11111111.00000000.00000000        看下 你電腦的子網掩碼配置 是這個就寫16
255.255.255.0 11111111.11111111.11111111.00000000     看下 你電腦的子網掩碼配置 是這個就寫24
 
例如:
我的電腦是255.255.0.0   ip地址192.168.0.69,我就寫成192.168.0.69/16即可
 

 下面附上鏈接成功的圖片

 


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