And by the way: These are the two rules I’m using to don’t get any warnings when I power off my printers:
Setup → Hosts → Host monitoring rules → Host Check Command: [ref: [Check_mk (deutsch)] Ausgeschalteter Drucker]
Setup → Agents → Agent access rules → Status of the Checkmk services [ref: Check_MK Service "critical" trotz Hostregel "Always assume host to be up" - #4 by andreas-doehler]:
