Java centOS中与postgresql的连接被拒绝

我知道很多人都会问这个问题，但我尝试了很多解决方案，但任何一个都是正确的

因此，我无法从远程客户端（LAN中）连接到我的postgresql server（在CentOS 6.4最低版本上-我只有postgresql server、ftp和ssh服务）。我有ssh连接，所以我认为这个问题可以通过tcp/ip权限解决。 Java抛出异常：

    org.postgresql.util.PSQLException: Connection refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.
    at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:207)
    at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:64)
    at org.postgresql.jdbc2.AbstractJdbc2Connection.<init>(AbstractJdbc2Connection.java:136)
    at org.postgresql.jdbc3.AbstractJdbc3Connection.<init>(AbstractJdbc3Connection.java:29)
    at org.postgresql.jdbc3g.AbstractJdbc3gConnection.<init>(AbstractJdbc3gConnection.java:21)
    at org.postgresql.jdbc4.AbstractJdbc4Connection.<init>(AbstractJdbc4Connection.java:31)
    at org.postgresql.jdbc4.Jdbc4Connection.<init>(Jdbc4Connection.java:24)
    at org.postgresql.Driver.makeConnection(Driver.java:393)
    at org.postgresql.Driver.connect(Driver.java:267)
    at java.sql.DriverManager.getConnection(Unknown Source)
    at java.sql.DriverManager.getConnection(Unknown Source)
    at Main.main(Main.java:19)
Caused by: java.net.ConnectException: Connection timed out: connect
    at java.net.DualStackPlainSocketImpl.connect0(Native Method)
    at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
    at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
    at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
    at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
    at java.net.PlainSocketImpl.connect(Unknown Source)
    at java.net.SocksSocketImpl.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at org.postgresql.core.PGStream.<init>(PGStream.java:60)
    at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:101)
    ... 11 more

/var/lib/pgsql/9.2/data/pg_hba.conf-仅文件的主要部分

 # "local" is for Unix domain socket connections only
local   all             all                                     peer
# IPv4 local connections:
host    all             all             127.0.0.1/32            ident
host    all             all             192.168.1.18 255.255.255.0      password
#hostssl all            all             192.168.1.18 255.255.255.0      trust
#hostnossl      all     all             192.168.1.18 255.255.255.0      trust
# IPv6 local connections:
host    all             all             ::1/128                 ident
# Allow replication connections from localhost, by a user with the
# replication privilege.
#local   replication     postgres                                peer
#host    replication     postgres        127.0.0.1/32            ident
#host    replication     postgres        ::1/128                 ident

host all all 192.168.1.18 255.255.255.255 password
host all all ::1 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff password

var/lib/pgsql/9.2/data/poissgresql.conf-仅主要部分

# - Connection Settings -

listen_addresses = '*'
#'localhost,192.168.1.18'
                                        # what IP address(es) to listen on;
                                        # comma-separated list of addresses;
                                        # defaults to 'localhost'; use '*' for all
                                        # (change requires restart)
#port = 5432                            # (change requires restart)
max_connections = 100                   # (change requires restart)
# Note:  Increasing max_connections costs ~400 bytes of shared memory per
# connection slot, plus lock space (see max_locks_per_transaction).
#superuser_reserved_connections = 3     # (change requires restart)
#unix_socket_directory = ''             # (change requires restart)
#unix_socket_group = ''                 # (change requires restart)
#unix_socket_permissions = 0777         # begin with 0 to use octal notation
                                        # (change requires restart)
#bonjour = off                          # advertise server via Bonjour
                                        # (change requires restart)

最后一个调试信息是commentnetstat-ta

Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address               Foreign Address             State
tcp        0      0 *:ssh                       *:*                         LISTEN
tcp        0      0 *:postgres                  *:*                         LISTEN
tcp        0      0 localhost:smtp              *:*                         LISTEN
tcp        0     52 PC2.home:ssh                Michal-laptop.home:26146    ESTABLISHED
tcp        0      0 PC2.home:ssh                Michal-laptop.home:25917    ESTABLISHED
tcp        0      0 *:ssh                       *:*                         LISTEN
tcp        0      0 *:postgres                  *:*                         LISTEN
tcp        0      0 localhost:smtp              *:*                         LISTEN

你能帮我的忙吗？我应该怎么做才能允许连接？

---

谢谢您的时间。

在var/lib/pgsql/9.2/data/poistgresql.conf中

取消第行下方的注释：

#port = 5432 

---

如果需要，可以更改侦听端口。重新启动服务。

由于无法远程登录到服务器端口5432，因此必须在防火墙中打开端口5432

---

想想看，这就像是控制台上的

System->Administration->Firewall

或

/usr/bin/System-config-Firewall

。

从你的客户端机器上，你能做到

telnet 192.168.1.16 5432

？如果它说连接失败或连接超时，很可能是服务器上的防火墙不允许该端口。我尝试了一下，你是对的：telnet:connect to address 192.168.1.18:connection time extut 5432是默认值，因此我认为它不必取消注释，因为我没有更改它。-如果不起作用，请尝试一下，您可以后退：）。根据我的说法，它会起作用的；）是的，谢谢你的关注，我试着改变它，但没有帮助。这是一个复杂的情况，因为centOS是虚拟机。你是对的。我解决了命令服务iptables stop的问题，但您知道我应该向iptables文件中添加哪些不停止fireware的内容吗？我尝试添加line-A输入-p tcp--dport 5432-j接受，但没有帮助？？我想这最好作为一个单独的问题，以免弄乱局面。

#port = 5432