Database-2.Remote Connection

 

PostgreSQL 16 : Remote Connection2023/12/07

	It's possible to connect to PostgreSQL Server only from Localhost by default like here, but if you'd like to connect to PostgreSQL from Remote hosts, change settings like follows.
[1]	There are many authentication methods on PostgreSQL, though. On this example, Configure SCRAM-SHA-256 password method.

[root@www ~]#  vi /var/lib/pgsql/data/postgresql.conf # line 60 : uncomment and change # if listens only IPv4, set '0.0.0.0' listen_addresses = ' * ' [root@www ~]#  vi /var/lib/pgsql/data/pg_hba.conf # add to the end # TYPE DATABASE USER ADDRESS METHOD # "local" is for Unix domain socket connections only local all all peer # IPv4 local connections: host all all 127.0.0.1/32 ident # IPv6 local connections: host all all ::1/128 ident # Allow replication connections from localhost, by a user with the # replication privilege. local replication all peer host replication all 127.0.0.1/32 ident host replication all ::1/128 ident # specify network range you allow to connect on [ADDRESS] section # if allow all, specify [0.0.0.0/0] host all all 10.0.0.0/24 scram-sha-256 [root@www ~]#  systemctl restart postgresql

[2]	If Firewalld is running, allow PostgreSQL service.

[root@www ~]#  firewall-cmd --add-service=postgresql success [root@www ~]#  firewall-cmd --runtime-to-permanent success

[3]	To connect to a PostgreSQL Database with password, set password for each PostgreSQL user.

# connect to own database [cent@www ~]$  psql -d testdb psql (16.0) Type "help" for help. # set or change own password testdb=> \password Enter new password for user "cent": Enter it again: testdb=> \q # also possible to set or change password for any users with PostgreSQL admin user [postgres@www ~]$  psql -c "alter user cent with password 'password';" ALTER ROLE

[4]	Verify settings to connect to PostgreSQL Database with password from remote hosts.

[root@node01 ~]#  psql -h www.srv.world -d testdb -U cent Password for user cent: # password psql (16.0) Type "help" for help. testdb=> # connected