edit your postgresql.conf, makesure tcpip_socket=true and port = 5432
and pg_hba.conf, please put the ip address of the terminal that you want to connect to the server together with subnet mask.
local   all         all                                 trust
host    all         all         127.0.0.1         255.255.255.255   trust
host    all         all         xxx.xxx.xxx.xxx    255.255.255.255   trust
xxx.xxx.xxx.xxx is your ip address