Test-Port.ps1
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function Test-Port{ <# .SYNOPSIS Tests port on computer. .DESCRIPTION Tests port on computer. .PARAMETER computer Name of server to test the port connection on. .PARAMETER port Port to test .PARAMETER tcp Use tcp port .PARAMETER udp Use udp port .PARAMETER UDPTimeOut Sets a timeout for UDP port query. (In milliseconds, Default is 1000) .PARAMETER TCPTimeOut Sets a timeout for TCP port query. (In milliseconds, Default is 1000) .NOTES Name: Test-Port.ps1 Author: Boe Prox DateCreated: 18Aug2010 List of Ports: http://www.iana.org/assignments/port-numbers To Do: Add capability to run background jobs for each host to shorten the time to scan. .LINK https://boeprox.wordpress.org .EXAMPLE Test-Port -computer 'server' -port 80 Checks port 80 on server 'server' to see if it is listening .EXAMPLE 'server' | Test-Port -port 80 Checks port 80 on server 'server' to see if it is listening .EXAMPLE Test-Port -computer @("server1","server2") -port 80 Checks port 80 on server1 and server2 to see if it is listening .EXAMPLE Test-Port -comp dc1 -port 17 -udp -UDPtimeout 10000 Server : dc1 Port : 17 TypePort : UDP Open : True Notes : "My spelling is Wobbly. It's good spelling but it Wobbles, and the letters get in the wrong places." A. A. Milne (1882-1958) Description ----------- Queries port 17 (qotd) on the UDP port and returns whether port is open or not .EXAMPLE @("server1","server2") | Test-Port -port 80 Checks port 80 on server1 and server2 to see if it is listening .EXAMPLE (Get-Content hosts.txt) | Test-Port -port 80 Checks port 80 on servers in host file to see if it is listening .EXAMPLE Test-Port -computer (Get-Content hosts.txt) -port 80 Checks port 80 on servers in host file to see if it is listening .EXAMPLE Test-Port -computer (Get-Content hosts.txt) -port @(1..59) Checks a range of ports from 1-59 on all servers in the hosts.txt file #> [cmdletbinding( DefaultParameterSetName = '', ConfirmImpact = 'low' )] Param( [Parameter( Mandatory = $True, Position = 0, ParameterSetName = '', ValueFromPipeline = $True)] [array]$computer, [Parameter( Position = 1, Mandatory = $True, ParameterSetName = '')] [array]$port, [Parameter( Mandatory = $False, ParameterSetName = '')] [int]$TCPtimeout=1000, [Parameter( Mandatory = $False, ParameterSetName = '')] [int]$UDPtimeout=1000, [Parameter( Mandatory = $False, ParameterSetName = '')] [switch]$TCP, [Parameter( Mandatory = $False, ParameterSetName = '')] [switch]$UDP ) Begin { If (!$tcp -AND !$udp) {$tcp = $True} #Typically you never do this, but in this case I felt it was for the benefit of the function #as any errors will be noted in the output of the report $ErrorActionPreference = "SilentlyContinue" $report = @() } Process { ForEach ($c in $computer) { ForEach ($p in $port) { If ($tcp) { #Create temporary holder $temp = "" | Select Server, Port, TypePort, Open, Notes #Create object for connecting to port on computer $tcpobject = new-Object system.Net.Sockets.TcpClient #Connect to remote machine's port $connect = $tcpobject.BeginConnect($c,$p,$null,$null) #Configure a timeout before quitting $wait = $connect.AsyncWaitHandle.WaitOne($TCPtimeout,$false) #If timeout If(!$wait) { #Close connection $tcpobject.Close() Write-Verbose "Connection Timeout" #Build report $temp.Server = $c $temp.Port = $p $temp.TypePort = "TCP" $temp.Open = $False $temp.Notes = "Connection to Port Timed Out" } Else { $error.Clear() $tcpobject.EndConnect($connect) | out-Null #If error If($error[0]){ #Begin making error more readable in report [string]$string = ($error[0].exception).message $message = (($string.split(":")[1]).replace('"',"")).TrimStart() $failed = $true } #Close connection $tcpobject.Close() #If unable to query port to due failure If($failed){ #Build report $temp.Server = $c $temp.Port = $p $temp.TypePort = "TCP" $temp.Open = $False $temp.Notes = "$message" } Else{ #Build report $temp.Server = $c $temp.Port = $p $temp.TypePort = "TCP" $temp.Open = $True $temp.Notes = "" } } #Reset failed value $failed = $Null #Merge temp array with report $report += $temp } If ($udp) { #Create temporary holder $temp = "" | Select Server, Port, TypePort, Open, Notes #Create object for connecting to port on computer $udpobject = new-Object system.Net.Sockets.Udpclient #Set a timeout on receiving message $udpobject.client.ReceiveTimeout = $UDPTimeout #Connect to remote machine's port Write-Verbose "Making UDP connection to remote server" $udpobject.Connect("$c",$p) #Sends a message to the host to which you have connected. Write-Verbose "Sending message to remote host" $a = new-object system.text.asciiencoding $byte = $a.GetBytes("$(Get-Date)") [void]$udpobject.Send($byte,$byte.length) #IPEndPoint object will allow us to read datagrams sent from any source. Write-Verbose "Creating remote endpoint" $remoteendpoint = New-Object system.net.ipendpoint([system.net.ipaddress]::Any,0) Try { #Blocks until a message returns on this socket from a remote host. Write-Verbose "Waiting for message return" $receivebytes = $udpobject.Receive([ref]$remoteendpoint) [string]$returndata = $a.GetString($receivebytes) If ($returndata) { Write-Verbose "Connection Successful" #Build report $temp.Server = $c $temp.Port = $p $temp.TypePort = "UDP" $temp.Open = $True $temp.Notes = $returndata $udpobject.close() } } Catch { If ($Error[0].ToString() -match "\bRespond after a period of time\b") { #Close connection $udpobject.Close() #Make sure that the host is online and not a false positive that it is open If (Test-Connection -comp $c -count 1 -quiet) { Write-Verbose "Connection Open" #Build report $temp.Server = $c $temp.Port = $p $temp.TypePort = "UDP" $temp.Open = $True $temp.Notes = "" } Else { <# It is possible that the host is not online or that the host is online, but ICMP is blocked by a firewall and this port is actually open. #> Write-Verbose "Host maybe unavailable" #Build report $temp.Server = $c $temp.Port = $p $temp.TypePort = "UDP" $temp.Open = $False $temp.Notes = "Unable to verify if port is open or if host is unavailable." } } ElseIf ($Error[0].ToString() -match "forcibly closed by the remote host" ) { #Close connection $udpobject.Close() Write-Verbose "Connection Timeout" #Build report $temp.Server = $c $temp.Port = $p $temp.TypePort = "UDP" $temp.Open = $False $temp.Notes = "Connection to Port Timed Out" } Else { $udpobject.close() } } #Merge temp array with report $report += $temp } } } } End { #Generate Report $report } } |