What tools do you use to check if your host/devices on your network are online in one glance. i have multiple companies with APs, servers and NAS. Of course I can ping one by one, but I'm sure you have a better one. I heard Nagios Core seem the solution, but it hell of overkill features.
Same question here asked by https://serverfault.com/questions/785045/monitoring-if-the-ip-is-down-not-up but yet to be answered.
Newbie here.
Thank you in advance,