We are facing an issue with our current zabbix setup, being the agent is up still we are getting alerts for zabbix agent is not reachable for all the hosts.
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Take a look at the 2 flow-charts here: https://zabbix.org/wiki/Troubleshoot..._debug_that.3F -
Sounds like you have firewall issues somewhere.
Is your item configured as Zabbix Agent or Zabbix Agent Active?
If Zabbix Agent, the server or proxy has to be able to talk to the host on port 10050
If Zabbix Agent Active, the host the agent is on must talk to the Zabbix server or proxy on port 10051.
If you are using the built-in template: Template App Zabbix Agent the items are "Zabbix Agent". Look at a host in the GUI, I belt the "Z" at the top is red.
The trigger expression is using the (no data) function, if Zabbix does not receive data from the agent the trigger fires.
Hope this helps.Comment
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