Zabbix hosts on different subnet

[emil1818]

Hi. I installed Zabbix server on Debian 12 on address 10.10.10.45. PC hosts and switches from this subnet are corrently monitored, availability button is green. I have problem with other hosts on different subnet e.g. 192.168.252.1. Availability button is red. I can ping and telnet successfully both hosts and server.

192.168.252.156 host in zabbix_agentd.log
14136:20240930:084803.813 failed to accept an incoming connection: connection from "192.168.252.1" rejected, allowed hosts: "10.10.10.45"

zabbix_agentd.conf
Server=10.10.10.45
ServerActive=10.10.10.45

Please help me with this problem.

[cyber]

Is there soemkind of weird address translation between networks? Your log defintiely says, that connection is coming from 192.168.252.1 and not from 10.10.10.45.

[emil1818]

PC VLAN 192.168.252.1 (IP 192.168.252.156), server VLAN 10.10.10.1 (IP 10.10.10.45).