The firewall settings
When we begin using a Zabbix proxy in our environment, we need to take care of the data flow and the open ports or firewall rules.
In a non-Zabbix-proxy environment, it is necessary for the Zabbix server to have access to all the hosts monitored at the ports used for data collection. If we have several remote networks, we must provide the necessary firewall rules.
When we begin using a Zabbix proxy, the flow changes and the needs are much smaller. This makes it easier to negotiate with the security personnel. In this case, we only need to ensure that the Zabbix proxy and Zabbix server are able to exchange information through port 10051 TCP on both the sides.
So, the environment can now be envisioned using at least one Zabbix ...
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