Enable PSK Encryption for Zabbix Proxy
This time I set up PSK encryption specifically for communications between the Zabbix Server and the Zabbix Proxy.
Enabling PSK encryption for Agents behind a Proxy, only encrypts communications between the Agent and the Proxy.
If your agents are in a DMZ then you may not desire encryption. But you should at least also encrypt the communications between the Zabbix Server and Proxy if it travels across a public network.