Linux Agent issue "Received empty response from Zabbix Agent"

[XKaliber]

After installing Linux Agent in CentOS VM virtual host, I recieve the following message in Zabbix server:

Received empty response from Zabbix Agent at [10.1.68.105]. Assuming that agent dropped connection because of access permissions

from the log showing services are running:

15237:20120616:162041.559 Starting Zabbix Agent [Zabbix server]. Zabbix 2.0.0 (revision 27675).
15238:20120616:162041.601 agent #0 started [collector]
15239:20120616:162041.603 agent #1 started[listener]
15240:20120616:162041.604 agent #2 started[listener]
15241:20120616:162041.605 agent #3 started[listener]
15242:20120616:162041.605 agent #4 started [active checks]

This is my iptables configuration and me turning it off to see if its the problem:

[root@localhost ~]# iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
ACCEPT all -- anywhere anywhere state RELATED,ESTAB LISHED
ACCEPT icmp -- anywhere anywhere
ACCEPT all -- anywhere anywhere
ACCEPT tcp -- anywhere anywhere state NEW tcp dpt:s sh
ACCEPT tcp -- 10.1.68.110 anywhere tcp dpt:zabbix-agen t
REJECT all -- anywhere anywhere reject-with icmp-ho st-prohibited

Chain FORWARD (policy ACCEPT)
target prot opt source destination
REJECT all -- anywhere anywhere reject-with icmp-ho st-prohibited

Chain OUTPUT (policy ACCEPT)
target prot opt source destination
[root@localhost ~]# service iptables stop
iptables: Flushing firewall rules: [ OK ]
iptables: Setting chains to policy ACCEPT: nat mangle filte[ OK ]
iptables: Unloading modules: [ OK ]

parts of .conf

# Default:
DebugLevel=4
# Default:
# Server=

Server=10.1.68.110
# ServerActive=

ServerActive=10.1.68.110
# Hostname=

Hostname=CentOS6
# Default:
# HostnameItem=system.hostname

Hostname is CentOS6 on server and ip addresses are correct. I have a Windows agent installed on another vm and it is successfully communicating.

IP for server: 10.1.68.110
IP for CentOS: 10.1.68.105

24 bit masks. I can ping

[root@localhost ~]# ping 10.1.68.110
PING 10.1.68.110 (10.1.68.110) 56(84) bytes of data.
64 bytes from 10.1.68.110: icmp_seq=1 ttl=64 time=0.782 ms
64 bytes from 10.1.68.110: icmp_seq=2 ttl=64 time=0.323 ms
64 bytes from 10.1.68.110: icmp_seq=3 ttl=64 time=0.280 ms

and ssh.

Any help would be appreciated. I'm at a loss. Thanks!

[rodrigaos]

I've the same problem

I installed yesterday the Zabbix 2.0, but it's occurrs the same problem. Any Can help us?

[artsangel]

Double check your zabbix_agentd.conf file and make sure you have the correct Server variable configured for your zabbix server URL/IP.

[rodrigaos]

I resolved!!!!!

artsangel Good Afternoon,

I hapenned fix the problem. This exactly that you say. I rewrite the file zabbix_agentd.conf in the directory /usr/local and fixed my problem.

Thank You !!

[venuz]

Received empty response from Zabbix Agent

Even after configuring everything properly i'm unable to make an agent connection proper.
Error: Z icon is red in color and when i click i get the following error.

Received empty response from Zabbix Agent at [ip] . Assuming that agent dropped connection because of access permission

[Nux]

You must modify `Server=127.0.0.1` in `etc/zabbix/zabbix_agentd.conf`. That's the list of IP addresses that can connect to the agent. So you need to add IP of your server e.g.:
Server=127.0.0.1,192.168.0.123