[agent]: Error establishing TLS connection

Troubleshooting
1

Hey guys,

CheckMK Version : 2.2.0p23 - Cloud Edition

I’m trying to connect the agent from a Windows Server, but for some strange reason it is saying on the CheckMK interface : [agent]: Error establishing TLS connection.
I was able to register the server inside and telnet to 6556 is working.
I was able to connect around 40 servers and this is the first time I’m seeing it with the approach from the docs. (Side info I’m using 11111 as a port for agent communication and telnet to that port works from the machine as well.)
Any ideas why this might be happening?

Output of agent-ctl status :

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image1296×498 130 KB

CheckMK Error :

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image1402×310 19.2 KB

2

I’ve also tried unregistering and uninstalling and reinstalling the agent, but seems like I’m getting the same errors. Also I can see data on the Perf-O meter, which should indicate that the communication is working.

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image2618×260 42.2 KB

4

Problem wasn’t caused by CheckMK (wrong ip’s were set on 2 hosts, hence giving this error)