Checking Network Connections

by Feb 2, 2018

If your machine is connected to the internet (or VPN) via different network connections, depending on where you are, then the following two functions may be useful to you.

Get-ActiveConnection lists the names of all network connections that currently have an IP address assigned. Test-ActiveConnection accepts a keyword and checks to see whether there are currently any active connections with the keyword in their name.

function Get-ActiveConnection
    Get-WmiObject -Class Win32_NetworkAdapterConfiguration |
    Where-Object { $_.IPAddress } |
    Select-Object -ExpandProperty Description
function Test-ActiveConnection
  @(Get-WmiObject -Class Win32_NetworkAdapterConfiguration |
    Where-Object { $_.IPAddress } |
    Where-Object { $_.Description -like "*$Keyword*" }).Count -gt 0

Here is a quick example output:

PS> Get-ActiveConnection
Dell Wireless 1820A 802.11ac
PS> Test-ActiveConnection dell
PS> if ( (Test-ActiveConnection dell) ) { Write-Warning "Connected via DELL network card" }
WARNING: Connected via DELL network card

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