Agent controller - Connection refused

Problem

With Checkmk 2.1 we released the new agent controller with TLS connection. Detailed docs can be found here:

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netsh interface ipv4 show excludedportrange protocol=tcp

Solution

For Linux

If the registration is good, but cmk-agent-ctl cannot be started. This might be a bug.

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ss -tulpn | grep 6556
systemctl status check-mk-agent.socket

Registration with cmk-agent-ctl is not working

Problem

After installing the agent, the registration is not working and showing the following issue:

Solution

Please check and verify that the agent controller is running:

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Without the bakery, please follow these steps: https://docs.checkmk.com/latest/en/agent_linux_legacy.html#_systemd

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