CRITICAL: No output available from command

Question

Hello, I have a powershell script for monitoring the windows firewall :

if (((Get-NetFirewallProfile | select name,enabled) | where { $_.Enabled -eq $True } | measure ).Count -eq 3) {exit 0} else {exit 2}

In nsclient.ini I have :

check_fw_state=cmd /c echo scripts\\custom\\check_fw_state.ps1; exit($lastexitcode) | powershell.exe -command -

When I launch it I have this :

PS C:\Program Files\Centreon NSClient++\scripts\custom> .\check_fw_state.ps1
PS C:\Program Files\Centreon NSClient++\scripts\custom> $LASTEXITCODE
2

But when I try with nscp test I have this :

check_fw_state
D ext-script Command line: cmd /c echo scripts\\custom\\check_fw_state.ps1; exit($lastexitcode) | powershell.exe -comma
d -
L cli CRITICAL: No output available from command (check_fw_state).
L cli Performance data:

What do I miss ?

NB: If I put a Write-Host “2”instead of “exit 2” I get the return but it’s not a critical :

check_fw_state
D ext-script Command line: cmd /c echo scripts\\custom\\check_fw_state.ps1; exit($lastexitcode) | powershell.exe -comman
d -
L cli OK: 2
L cli Performance data:

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OK I Find out what the problem is. the powershell must return something else than the exit code like this :

if (((Get-NetFirewallProfile | select name,enabled) | where { $_.Enabled -eq $True } | measure ).Count -eq 3) {write-host "OK : FW is ON"; exit 0} else {write-host "CRITICAL : FW is OFF"; exit 2}

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coolrider · Accepted Answer

OK I Find out what the problem is. the powershell must return something else than the exit code like this :

if (((Get-NetFirewallProfile | select name,enabled) | where { $_.Enabled -eq $True } | measure ).Count -eq 3) {write-host "OK : FW is ON"; exit 0} else {write-host "CRITICAL : FW is OFF"; exit 2}

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