netsh firewall set icmpsetting 8

netsh advfirewall firewall add rule name="ICMP Allow incoming V4 echo request"
    protocol=icmpv4:8,any dir=in action=allow

# allow-icmp.ps1
# Sets up windows firewall to allow inbound ICMP - using PowerShell
# Thomas Lee - tfl@psp.co.uk

#create firewall manager object
$FWM=new-object -com hnetcfg.fwmgr

# Get current profile
$pro=$fwm.LocalPolicy.CurrentProfile

# Check Profile
if ($pro.IcmpSettings.AllowInboundEchoRequest) {
    "Echo Request already allowed"
} else {
    $pro.icmpsettings.AllowInboundEchoRequest=$true
}

# Display ICMP Settings
"Windows Firewall - current ICMP Settings:"
"-----------------------------------------"
$pro.icmpsettings

netsh advfirewall firewall add rule name="ICMP Allow incoming V4 echo request" protocol=icmpv4:8,any dir=in action=allow

Set-NetFirewallRule -DisplayName "File and Printer Sharing (Echo Request - ICMPv4-In)" -enabled True
Set-NetFirewallRule -DisplayName "File and Printer Sharing (Echo Request - ICMPv6-In)" -enabled True