Zabbix communication between agent and server is secure?

Question

Zabbix

Whether interests can sniffer traffic from the agent to the server.
Do I need to turn it into vpn?

Answer 1

They can. Convenient json inside :)
By 2.5, ssl can be filed)
https://support.zabbix.com/browse/ZBXNEXT-1263

Answer 2

You can even impudently spoof it, and if, say, the execution of remote commands is allowed, you can do a lot of things.