How to basic configure zabbix proxy (4.4)?

Question

Zabbix

Good afternoon.
There are 2 servers (both with agents).
1- zabbix server (xxx200),
2- zabbix proxy (xxx202)
All settings are default.
I add a proxy to the server, it is viewed. I add a proxy agent to monitoring, it is monitored. As soon as I configure the proxy server agent in the "Monitoring through proxy" web, it stops being monitored.

###### Server proxy settings
Server=xxx200
ServerActive=xxx200
Hostname=xxx202
###### Agent proxy settings
Server=xxx200
Hostname=xxx202

On the web, there is a red 'Z' above the host and the inscription "Received empty response from Zabbix Agent" at [xxx202].Assuming that agent dropped connection because of access permissions"

in proxy agent logs "failed to accept an incoming connection: connection from "xxx202" rejected, allowed hosts: "xxx200""

in zabbix server logs "cannot send list of active checks to "xxx202": host [xxx202] not found"