[Zabbix Server] Changing ListenPort from 10051

[StealthJoe]

Hi, I'm trying to set a custom port for Zabbix to listen on for active agents. I've done this before but running into an issue and can't remember how I solved it.

First I change "ListenPort" in "zabbix_server.conf" to my desired port.

I then change the port also in "zabbix.conf.php".

When I do this I get error "listener failed: bind() for [[-]:10052 failed: [13] Permission denied" and the service keeps trying to reboot.

Then I run "setenforce 0" and the server starts up no problem. I enabled all the Zabbix related options for SELinux, httpd_can_connect_zabbix --> on | zabbix_can_network --> on | zabbix_run_sudo --> on but this made no difference.

I have a feeling the issue is then related to httpd and there is a different SELinux rule that I need to enable.

Does anyone know how to fix this? I would prefer to keep SELinux enforcing.

Thanks!

[StealthJoe]

Very quickly I found the answer after running "journalctl | grep zabbix".

The command to fix this is: "semanage port -a -t zabbix_port_t -p tcp 10052" (or whatever your custom port it)

Figured I should put this out here since I couldn't' find anything online.

FYI I am running CentOS 8.

Cheers