Zabbix server does not see the active port
10.150.26.101 - my ceph server 10.247.8.54 - my zabbix proxy server
firewall on target server OS centOS7
[root@ceph-02 ~]# firewall-cmd --info-service=zabbix-agent2
zabbix-agent2
ports: 10050/tcp 10051/tcp
protocols:
source-ports:
modules:
destination:
availability from a ceph server:
[root@ceph-02 ~]# telnet 10.247.8.54 10050
Trying 10.247.8.54...
Connected to 10.247.8.54.
Escape character is '^]'.
Connection closed by foreign host.
[root@ceph-02 ~]# telnet 10.247.8.54 10051
Trying 10.247.8.54...
Connected to 10.247.8.54.
Escape character is '^]'.
availability from a proxy server:
[root@zbx-proxy ~]# telnet 10.150.26.101 10050
Trying 10.150.26.101...
Connected to 10.150.26.101.
Escape character is '^]'.
Connection closed by foreign host.
[root@zbx-proxy ~]# telnet 10.150.26.101 10051
Trying 10.150.26.101...
telnet: connect to address 10.150.26.101: Connection refused
log from zabbix agent:
2021/08/17 02:46:13.629379 [101] active check configuration update from [zbx-proxy.domain.loc:10051 ceph-02.domain.loc] started to fail (Cannot read message: 'read tcp 10.150.26.101:60011->10.247.8.54:10051: i/o timeout')
Zabbix server refuses to call a session on the active port of zabbix agent2 even though all ports are open, what could be the matter?
