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Your Checkmk site is not accessible anymore after you updated your appliance firmware, or Checkmk, or a simple reboot.


The root of these issues lies in outdated appliance firmware.

All relevant background information can be found in Werk 14281.


The solution is rather simple and outlined in the abovementioned Werk:

  1. Log into your appliance as root
  2. For each site that resides on the appliance, run: 

    omd update-apache-config $SITE
  3. You should be back online now, but the next step is necessary for a permantent fix
  4. As soon as possible, upgrade to an up-to-date firmware version