OPNsense mk_check_agent won't work (freebsd)

Troubleshooting
1

2.0.0p17:
freebsd:

Error message:

i tried installing it with these steps
https://forum.opnsense.org/English_Forums/Tutorials_and_FAQs/Check_MK_Agent_setup

how can i get it to run?

Output of “cmk --debug -vvn hostname”: (If it is a problem with checks or plugins)

2

Hi,

Well the instructions there worded for me, so, in theory it should work. How are you trying to access the agent? Via inetd or ssh? I remember that I switched to ssh in the end because opnsense kept resetting my changes in the configuration files at every reboot.

Louis

3

thanks for the answer louis, i used inetd.
how can i make sure that the agent is running?
if i execute it via ./check_mk_agent it will just stop at
<<local:sep(0)>>

and if i reboot and start inetd it does not work.
thanks for you help

4

Hi Marius,

You just described the reasons why I switched to ssh. If you reboot you’ll have to do most of the configuration again, as OpnSense will reset whatever changes you made in /etc/services and /etc/hosts.allow.

But what you always can try, after re-adding everything to the files, add also this line to /etc/hosts.allow:

check_mk_agent : 127.0.0.1 : allow

Make sure that’s before the deny all rule at the end. Then restart inetd:

/etc/rc.d/inetd onerestart

And try to access the agent from the command line:

telnet localhost 6556

That should give you the agent output

If that works, try from the CheckMK server (you may need to use nc -v instead of telnet there). If that doesn’t work, check if your CheckMK server is set correctly in hosts.allow. If so, maybe OpnSense is blocking something itself.

1 Like
5

thank you louis, this fixed my problem.

6

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