## pg_hba.conf

# "local" is for Unix domain socket connections only
local   all         all                               ident
# IPv4 local connections:
host    all         all         127.0.0.1/32          ident
# IPv6 local connections:
host    all         all         ::1/128               ident
host    all         user        10.240.217.103/8      md5

## postgresql.conf


listen_addresses = '*'          # what IP address(es) to listen on;
                                        # comma-separated list of addresses;
                                        # defaults to 'localhost', '*' = all
                                        # (change requires restart)
port = 5432                             # (change requires restart)
max_connections = 100                   # (change requires restart)

## attempt to connect on the command line

[root@ec2-184-73-145-17 php]# su - postgres
-bash-3.2$ psql forums -l bbadmin -p secret
psql: could not connect to server: No such file or directory
        Is the server running locally and accepting
        connections on Unix domain socket "/tmp/.s.PGSQL.0"?

## attempt to connect via script

[root@ec2-184-73-145-17 php]# php connect.php
PHP Warning:  pg_connect(): Unable to connect to PostgreSQL server: FATAL:  Ident authentication failed for user "bbadmin" in /home/bluethundr/php/connect.php on line 2

## php connect script

[root@ec2-184-73-145-17 php]# cat connect.php
<?php
$dbconn = pg_connect("host=localhost port=5432 user=bbadmin dbname=forums password=secret");
?>