Received empty response from Zabbix Agent at [x.x.x]. Assuming that agent dro

[theocastelo]

Hi Guys,

first, sorry for my bad english, but i really need help,

The zabbix is working through the network 172.12.x., Im monitoring few servers. fine.

I need to monitor a server on the network 192.12, already checked the firewall is released, the ports 10050, 10051, gave telnet server zabbix to host and host to the server, everything running normal.

The agentd.conf is in the right folder.

But when I give the command zabbix_get.exe system.uname response comes empty.

The agent icon turns red and gives the following message: Received empty response from Zabbix Agent at [192.12.xx]. Assuming That agent dropped connection because of access permissio

Can anyone help me please.

Thanks So much...

[tchjts1]

In zabbix_agentd, is Server= configured correctly?
Is the service running?

What does the monitored host show in zabbix_agentd.log?

[theocastelo]

hi tchjts1 , thanks for the reply...

In zabbix_agentd, is Server= configured correctly?

Yes, this server are correctly configured

Is the service running?

Yes, the service are running, and if i do zabbix_get in host agent, from the server, he gave me a empty string...

What does the monitored host show in zabbix_agentd.log?

I need to get this tomorrow on work, but if i remember, this log just tell me when service is up and monitoring port...

[theocastelo]

 24059:20130103:004116.106 Starting Zabbix Agent [xxxx]. Zabbix 2.0.4 
 24061:20130103:004116.107 agent #0 started [collector]
 24065:20130103:004116.108 agent #3 started[listener]
 24063:20130103:004116.108 agent #2 started[listener]
 24062:20130103:004116.108 agent #1 started[listener]

The info in log file, are the same on this...

I change the DebugLevel to 4, and ll post the results later..

[theocastelo]

tchjts1,

Looking in the Zabbix_agentd.log i find this lines:

25555:20130308:163914.103 Listener error: Connection from [192.168.XXX.XXX] rejected. Allowed server is [172.19.X.XX].
 25554:20130308:163915.068 In update_cpustats()
 25554:20130308:163915.069 End of update_cpustats()
 25554:20130308:163916.069 In update_cpustats()
 25554:20130308:163916.069 End of update_cpustats()
 many lines with the same code

explaining:

192.168.xx refers to the host
172.19.xx refers to the Zabbix Server
Both ports 10050 and 10051 are open on the firewall between the 2 network - 192.x and 172.x

This is the content of the file zabbix_agentd.conf:

##-----------Conf-----------------------------##

Server=172.19.x.xx
ListenIP=192.168.x.x
ListenPort=10050
Hostname=vm-inde01.xxxxxxxxx.xx.xx
LogFileSize=4
StartAgents=5
DebugLevel=4
PidFile=/var/run/zabbix/zabbix_agentd.pid
LogFile=/var/log/zabbix-agent/zabbix_agentd.log
Timeout=30
EnableRemoteCommands=1
RefreshActiveChecks=60
BufferSend=60
BufferSize=500
MaxLinesPerSecond=100

#------------end-----------------

The file zabbix_agentd.conf are in this folder:



The file in /usr/local/etc/zabbix_agentd.conf is one note (shortcut) to folder /etc/zabbix/zabbix_agentd.conf , as you can see in the above print;

And the service are up, as you can see here:



Well, if there's anything else I can do to try to help you understand the problem, let me know ...

thank you immensely for your help

[heaje]

tchjts1,

Looking in the Zabbix_agentd.log i find this lines:

25555:20130308:163914.103 Listener error: Connection from [192.168.XXX.XXX] rejected. Allowed server is [172.19.X.XX].
 25554:20130308:163915.068 In update_cpustats()
 25554:20130308:163915.069 End of update_cpustats()
 25554:20130308:163916.069 In update_cpustats()
 25554:20130308:163916.069 End of update_cpustats()
 many lines with the same code

Based on the error message, it looks like something in the 192.168.x.x range is trying to connect to your agent, not the server in 172.19.x.x. The error message is essentially saying "I'm configured to allow connections from 172.19.x.x, but something is connecting from 192.168.x.x. As a result, I'm refusing the connection".

Are you absolutely sure that your server connection isn't being NAT'd as it goes into the 192.168.x.x subnet? What happens if you add the 192.168.x.x address from the log entry to your Server line (comma delimited) in the agent?

[tchjts1]

Try commenting out this line: ListenIP=192.168.x.x in your zabbix_agentd.conf file and restarting your agent.