nagios CRIT - Cannot get data from TCP port x.x.x.x:6556

[agroknow]

Hi,

i am new to nagios. I have ctreated some hosts but one of the host gets the notification above :

CRIT - Cannot get data from TCP port x.x.x.x:6556 (in the x.x.x.x is the ip the vm i want to monitor )

I have tried some solutions on the internet but i get confused. Should i inlock port 6556 in the host vm ? Should i change the settings in the vm i have installed check_mk ?

Thank you

[tgriep]

Check_MK is not one of out products but it does look like you have to setup the server to allow inbound traffic on port 6556.
Take a look at the installation instructions at the link below.
https://mathias-kettner.de/checkmk_linuxagent.html

[agroknow]

where should i write a post about the check_mk ?

Thank you for the link i have already checked it and the agent is been installed. I have tried some things to open the port but with no success.

[agroknow]

Here are some feed back from checking the agent and i see that the port is listening. Any idea what to do?

[tgriep]

First, you should start by re-installing the agent by following the installation instructions at the link below.
https://mathias-kettner.de/checkmk_linuxagent.html