Network problem

I think I'm going insane.

In postgresql.conf I have:

tcpip_socket = true

In pg_hba.conf I have

host all all 0.0.0.0 0.0.0.0 trust

From the command line I run:

psql -h 10.3.4.110 bookreviews

(where 10.3.4.110 is the IP of the machine where pg is running and
obviously "bookreviews" is the name of my database)

I get:

psql: FATAL: no pg_hba.conf entry for host "10.3.4.110", user
"<USER>", database "bookreviews", SSL off

(where <USER> is my username)

If I run this:

psql bookreviews

It works fine, so it isn't the username or the database end. WHAT AM
I DOING WRONG??

I'm running from RPMs installed on RH 9. Oh, I also turned on the
logging and maxed debug up to 5 and all I get is the same thing the CL
shows me.