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Because Java does not support using unix sockets the
PostgreSQL™ server must be configured to
allow TCP/IP connections. Starting with server
version 8.0 TCP/IP connections are allowed from
localhost
. To allow connections to other interfaces
than the loopback interface, you must modify the
postgresql.conf
file's
listen_addresses
setting.
For server versions prior to 8.0 the server does not listen on any
interface by default, and you must set
tcpip_socket = true
in the
postgresql.conf
file.
Once you have made sure the server is correctly listening for
TCP/IP connections the next step is to verify
that users are allowed to connect to the server. Client authentication
is setup in pg_hba.conf
.
Refer to the main PostgreSQL™ documentation for
details. The JDBC driver supports the
trust
, ident
,
password
, md5
, and
crypt
authentication methods.