Zabbix Frontend MySQL setup failed - CentOS7, new 3.4 installation

[TheNetworkGuy]

Hi Zabbix forum members,

I'm trying to setup a new zabbix lab with dedicated database, server and front end VM's. Details are listed below:
- All machines can reach each other using ICMP ping
- Firewalld has been disabled on all machines
- All machines are on the same VLAN, no firewall or routing involved
- Software has been installed using the latest Zabbix YUM repo

192.168.5.111 Database
192.168.5.114 Server
192.168.5.116 Frontend

When running the setup.php on the new Frontend database i get the following error:

Error connecting to database: Can't connect to MySQL server on '192.168.5.111' (13 "Permission denied")

I added the SQL user using following commands:

mysql> create database zabbix character set utf8 collate utf8_bin;
mysql> grant all privileges on zabbix.* to [email protected]/255.255.255.0 identified by 'supersecretpassword';

The annoying thing is that i can connect from the Frontend server to the database using the mariadb-client package:

[root@frt01 zabbix]# mysql -h 192.168.5.111 -u zabbix -p zabbix
Enter password:
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 22
Server version: 5.5.56-MariaDB MariaDB Server

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]>

I'm copy pasting the password which works with the mysql-client command. I only installed the zabbix-web-mysql package on the Frontend server, no other Zabbix related packages / tools.

Does anyone have an idea where i can look next? Maybe some hidden log files etc?

Thanks in advance!

[TheNetworkGuy]

Problem solved.. SELinux got in the way on the frontend server.