pg_hba.conf

Hi again,

I need help to set up the config file pg_hba.conf..... The problem is that the
database only accepts connections coming from a local unix socket and not from
a valid tcp/ip address.
My pg_hba.conf file looks like this:

local all trust
host all 192.168.1.0 255.255.255.0 trust

I have a local network made up of two machines whose addresses are 192.168.1.1
and 192.168.1.2, so I tell to accept every request coming from the local
network. If I comment out the first line, relative to unix socket, and restart
postgresql, when I try to access a database I get an error message "user
authentication failed". Why's that? I think I start the postmaster in the right
way, that is, specifying the -i option:

case "$1" in
start)
echo -n "Starting postgresql service: "
su postgres -c '/usr/bin/postmaster -i -S -D/var/lib/pgsql'
sleep 1
pid=`pidof postmaster`
echo -n "postmaster [$pid]"
touch /var/lock/subsys/postmaster
echo
;;

Thank you for your help.
Greetings,

Antonello De Santis