Zabbix Server 6.4 active checks issue >> i/o timeout error

[rajanous]

Hi Guys,
can anyone help? FW issue?

2024/09/18 10:12:03.131601 Zabbix Agent2 hostname: [czcholsint1291.prg-dc.dhl.com]
2024/09/18 10:12:07.134051 [101] cannot connect to [czcholspc003075.prg-dc.dhl.com:10051]: dial tcp :0->2.255.8.175:10051: i/o timeout
2024/09/18 10:12:07.134089 [101] active check configuration update from host [czcholsint1291.prg-dc.dhl.com] started to fail

zabbix_agent2.conf
Server=czcholspc003075.prg-dc.dhl.com
ServerActive=czcholspc003075.prg-dc.dhl.com
Hostname=czcholsint1291.prg-dc.dhl.com

THX a lot

[cyber]

Its probably FW issue...