did not receive identification string

[limbooface]

All my workstations in the log file /var/log/secure I have so many entries for Did not receive identification string from "zabbix server ip" port random ports displayed. e.g Did not receive identification string from 8.8.8.8 port 40626
Now these message only turn off when I disable the host from zabbix server. But as soon as I enable the host again the message start to come through again.

Why is this and how do I stop this as its flooding my log files with these enties? I am centos.

[limbooface]

Any ideas anyone this is really filling my logs with junk. Has anyone had or has this issue?

[Atsushi]

Are you monitoring using SSH? If the SSH versions you are using do not match, you may see the message "Did not receive identification string from xxx".