You may want to create automation or monitoring scripts for all currently connected machines in your network. Using this function you can easily prepare a list of ip addresses to be checked.
You want to run a port scan on all machines in your network, e.g. using Patrick Gruenauer's Test-OpenPort.ps1, and your network range is 10.0.0.0/24 (10.0.0.0, Subnet 255.255.255.0):
Expand-IPRange -IPRange '10.0.0.0/24' `
| foreach ( Test-OpenPort -Target $_ -Port 80,443 )
or with more IP ranges and an array:
$IPs = '10.0.0.0/24','192.168.0.0/27' | Expand-IPRange
Test-OpenPort -Target $IPs -Port 80,443
Have fun and happy coding! Max