我知道很多人问这个问题,但我尝试了很多路径解决方案,但任何一个都是正确的。
因此,我无法从远程客户端(在 LAN 中)连接到我的 postgresql 服务器(在 CentOS 6.4 最小版本上 - 我只有 postgresql 服务器、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 权限来解决。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
如果配置:
eth0 Link encap:Ethernet HWaddr 08:00:27:F0:3A:F4
inet addr:192.168.1.18 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::a00:27ff:fef0:3af4/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2677 errors:0 dropped:0 overruns:0 frame:0
TX packets:1437 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:251266 (245.3 KiB) TX bytes:214910 (209.8 KiB)
/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/poistgresql.conf - 只有主要部分
# - 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)
最后的调试信息是注释 netstat -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
你能帮我吗?我应该怎么做才能允许连接?感谢您的时间。