zabbix agent ping

[samooil]

Dear Engineers Please advice

I have more than 1000 client behind the nat and I want to check availability. I already installed zabbix agent on them but when I stop the agent on them there isn't any alarm on zabbix server and the green on the agent ping graph still alive. would you please adive me what should I do.

Thank you in advance

[harmonica]

I,

Use the function nodata. Example:
agent.ping.nodata(300)}=1

[samooil]

Thanks for your reply

but what does mean 300??? 300 seconds? and you mean I define a trigger or I just change in agent.ping ?

[harmonica]

I,

Yes, 300 seconds.
Define a trigger like {Linux:agent.ping.nodata(300)}=1

[samooil]

Thanks for your advice

I defined that trigger but they are still alive. even I restarted the agent but they are still alive. I'm using passive check it means my agents are behind the nat and I didn't defined any ip address for the hosts in zabbix web interface. I'm really confused . please help me on this

thanks my friends