CREATE USER replication@'192.168.23.%';
CREATE USER backup@localhost;
GRANT ALL ON *.* TO replication@'192.168.23.%' WITH GRANT OPTION;
GRANT ALL ON *.* TO backup@localhost WITH GRANT OPTION;
SET PASSWORD FOR replication@'192.168.23.%' = PASSWORD('<a_good_Password>');
SET PASSWORD FOR backup@localhost = PASSWORD('<a_good_Password>');