Test for Localhost in Powershell?

Question

I have a powershell script that calls Get-WmiObject with -Credential. However, this errors out if I am running it against the local machine:

Get-WmiObject : User credentials cannot be used for local connections

What is the proper way to add an if localhost logic to avoid this error? Or is there a better way?

Answer 1

You could always query the local IP through WMI and store it in $localIP and then match that against whatever address is currently next in your pipeline or array:

if ($localIP -eq $otherIP) { get-wmiobject without -credential }    
else { existing query }

Answer 2

If you wrap it in a try catch block with erroraction stop on the first command, it will trap the error and run the catch block without credentials.

Try
{
Get-WmiObject -Credential domain\user -ComputerName localhost -class Win32_BIOS -erroraction Stop
}
Catch
{
Get-WmiObject -ComputerName localhost -class Win32_BIOS
}