I am running Zabbix Server 5.4.1 on Ubuntu Server, it's been working and we've upgraded several times since our install back in the 4.* days. Currently, most of our clients are still running the agent from a while ago; the reference working server is 5.0.2. Everything is working fine on these.
I am building some new servers, and went to install the newest agent, the 5.4.1 agent. I add the host to zabbix, enable automatic inventory, but the "ZBX" indicator turns red and has "Received empty response from Zabbix Agent at [10.1.*.*]. Assuming that agent dropped connection because of access permissions."
All servers have ipv6 disabled. If I run "grep . /etc/zabbix/zabbix_agentd.conf | grep -v -e "#"" the configurations are identical (with the server name changed of course) on all servers. From the non-working servers, I can do "telnet <zbxip> 10050" and get a connection, same on the working and non working servers.
I can see the zabbix agent process running, and if I do "netstat -tulpn" I can see the agent listening the same on all the servers.
I have debug log level 5 going on the non-working servers; I am seeing sensors being polled, but nothing to indicate an issue. I have no correlations between OS's working and not working, the primary difference seems to be the agent version.
What should my next troubleshooting steps be?
I am building some new servers, and went to install the newest agent, the 5.4.1 agent. I add the host to zabbix, enable automatic inventory, but the "ZBX" indicator turns red and has "Received empty response from Zabbix Agent at [10.1.*.*]. Assuming that agent dropped connection because of access permissions."
All servers have ipv6 disabled. If I run "grep . /etc/zabbix/zabbix_agentd.conf | grep -v -e "#"" the configurations are identical (with the server name changed of course) on all servers. From the non-working servers, I can do "telnet <zbxip> 10050" and get a connection, same on the working and non working servers.
I can see the zabbix agent process running, and if I do "netstat -tulpn" I can see the agent listening the same on all the servers.
I have debug log level 5 going on the non-working servers; I am seeing sensors being polled, but nothing to indicate an issue. I have no correlations between OS's working and not working, the primary difference seems to be the agent version.
What should my next troubleshooting steps be?