problem with check_snmp on linux

[sholdahl]

On my Nagios XI installation I have received errors from 3 hosts during the last 3-4 days.
The same service checks have been working fine until now.
The same errors appear on all hosts:

- ERROR: Description/Type table : No response from remote host 'x.x.x.x'
(check_xi_service_snmp_linux_storage) several disks

- No answer from host
(check_xi_service_snmp_linux_load) cpu load

- ERROR: Alarm signal (Nagios time-out)
(check_xi_service_snmp_linux_process) different processes

On one of the hosts some other service checks are working fine.

I'm not able to do a snmpwalk to either of the 3 hosts.
Nmap shows filtered snmp.

I have compared to other similar hosts, but I'm not able to see any differences.

Any suggestions what the problem might be?


CentOS 6.9 64-bit
Nagios XI 5.4.10

[kyang]

Can you show us the output of the snmpwalk command you are running? Or is there no output?

Is it something like this?

Code: Select all

snmpwalk 192.168.4.125 -c StrOngCOmmunity -v2c

Is the service snmpd started on the 3 hosts? What is the OS of the other three hosts?