设置远程登陆的三点注意事项 
看完下文我恍然知道，原来是我的windows防火墙没有关闭开启着却没有添加那个例外，导致之前在配置文件中配置的总是不生效。 
也就是说要修改三处地方！！！ 

由于postgresql没有正确设置允许的IP导致的，在 

A机器安装PostgreSQL，默认端口5432  
想实现B机器通过远程连接A机器的PostgreSQL服务。  
　　  
  1.如果A机器启动Windows防火墙，则在“例外”中“添加端口”加上5432端口。  
　　  
2.在postgresql.conf中的修改  
listen_addresses = '*'  
port = 5432  
　　  
3.在pg_hba.conf中添加  
host all all 192.168.1.2/32 trust 

# PostgreSQL Client Authentication Configuration File
# ===================================================
#
# Refer to the "Client Authentication" section in the PostgreSQL
# documentation for a complete description of this file. A short
# synopsis follows.
#
# This file controls: which hosts are allowed to connect, how clients
# are authenticated, which PostgreSQL user names they can use, which
# databases they can access. Records take one of these forms:
#
# local DATABASE USER METHOD [OPTIONS]
# host DATABASE USER CIDR-ADDRESS METHOD [OPTIONS]
# hostssl DATABASE USER CIDR-ADDRESS METHOD [OPTIONS]
# hostnossl DATABASE USER CIDR-ADDRESS METHOD [OPTIONS]
#
# (The uppercase items must be replaced by actual values.)
#
# The first field is the connection type: "local" is a Unix-domain
# socket, "host" is either a plain or SSL-encrypted TCP/IP socket,
# "hostssl" is an SSL-encrypted TCP/IP socket, and "hostnossl" is a
# plain TCP/IP socket.
#
# DATABASE can be "all", "sameuser", "samerole", "replication", a
# database name, or a comma-separated list thereof.
#
# USER can be "all", a user name, a group name prefixed with "+", or a
# comma-separated list thereof. In both the DATABASE and USER fields
# you can also write a file name prefixed with "@" to include names
# from a separate file.
#
# CIDR-ADDRESS specifies the set of hosts the record matches. It is
# made up of an IP address and a CIDR mask that is an integer (between
# 0 and 32 (IPv4) or 128 (IPv6) inclusive) that specifies the number
# of significant bits in the mask. Alternatively, you can write an IP
# address and netmask in separate columns to specify the set of hosts.
# Instead of a CIDR-address, you can write "samehost" to match any of
# the server's own IP addresses, or "samenet" to match any address in
# any subnet that the server is directly connected to.
#
# METHOD can be "trust", "reject", "md5", "password", "gss", "sspi",
# "krb5", "ident", "pam", "ldap", "radius" or "cert". Note that
# "password" sends passwords in clear text; "md5" is preferred since
# it sends encrypted passwords.
#
# OPTIONS are a set of options for the authentication in the format
# NAME=VALUE. The available options depend on the different
# authentication methods -- refer to the "Client Authentication"
# section in the documentation for a list of which options are
# available for which authentication methods.
#
# Database and user names containing spaces, commas, quotes and other
# special characters must be quoted. Quoting one of the keywords
# "all", "sameuser", "samerole" or "replication" makes the name lose
# its special character, and just match a database or username with
# that name.
#
# This file is read on server startup and when the postmaster receives
# a SIGHUP signal. If you edit the file on a running system, you have
# to SIGHUP the postmaster for the changes to take effect. You can
# use "pg_ctl reload" to do that.

# Put your actual configuration here
# ----------------------------------
#
# If you want to allow non-local connections, you need to add more
# "host" records. In that case you will also need to make PostgreSQL
# listen on a non-local interface via the listen_addresses
# configuration parameter, or via the -i or -h command line switches.

# TYPE DATABASE USER CIDR-ADDRESS METHOD

# IPv4 local connections:
host all all 127.0.0.1/32 md5
# IPv6 local connections:
host all all ::1/128 md5
host all all 192.168.1.106/32 trust