PowerShell Script to Disable/Re-enable a TCP/IP Port - powershell

Question

Is there a way to disable and re-enable a known TCP/IP port in PowerShell?

Answer 1

I'll make the blind assumption that you are talking about disabling & enabling TCP/IP sockets that are hosted by IIS. (Not, say, looking for ways to block/unblock things at the Firewall level, or something else entirely.) In that case, I happen to have the necessary scripts lying around...
# Get the IIsWebServer and IIsWebServerSetting WMI objects matching a display name, and combine them into one object
function Get-IIsWeb
{
param (
[string] $displayName = "",
[string] $computer = "localhost"
)
if ($displayName -eq "")
{ $filter = "" }
else
{ $filter = "ServerComment='$displayName'"}
Get-WmiObject -namespace "root\MicrosoftIISv2" -class "IIsWebServerSetting" -filter $filter -computer $computer -authentication 6 | % {
$temp = $_
Get-WmiObject -namespace "root\MicrosoftIISv2" -class "IIsWebServer" -filter "Name='$($_.Name)'" -computer $computer -authentication 6 |
add-member -membertype NoteProperty -name Settings -value $temp -passthru
}
}
# Stop all websites on a given computer that are bound to the specified port, unless they are scoped to a
# host header or IP address
function Stop-WebsiteOnPort
{
[CmdletBinding()]
param (
[Parameter(Mandatory=$true, valuefrompipeline=$true)]
[int] $port,
[Parameter(Position=0)]
[string] $computer = "localhost",
[Parameter()]
[string] $hostName = $null,
[Parameter()]
[string] $ip = $null
)
begin { $websites = Get-IIsWeb -computer $computer }
process
{
# I don't think you can do this filter in WQL
$websites |
? {
( $_.settings.serverbindings | ? {$_.port -eq $port -and $_.Hostname -eq $hostName -and $_.IP -eq $ip} | measure).count -gt 0
} |
% {
$_.stop()
}
}
}
The actual WMI code to re-enable a site is pretty much identical to the code for stopping one seen above. However, you'll need to do a little more work: there could be arbitrarily many sites configured to use a given port, but only 1 can run at a time. Either you'll need an additional parameter from the user, or some heuristic for picking the "right" site.