With this steps you can configure PostgreSQL to accept connections from the LAN on Port 5432.

1. edit /var/lib/pgsql/data/postgresql.conf
   listen_addresses = '*'
2. edit /var/lib/pgsql/data/pg_hba.conf add the network you want to allow like: host all all 192.168.190.0/24 md5
   The file looks then like:

   # "local" is for Unix domain socket connections only
   local   all             all                                     trust
   # IPv4 local connections:
   host    all             all             127.0.0.1/32            md5
   host    all             all             192.168.190.0/24        md5
   # IPv6 local connections:
   host    all             all             ::1/128                 md5
   

3. reload postgresql
   systemctl restart postgresql.service
4. check connection with pgAdmin or an other tool