Detect who is logged on to remote Windows machines

Question

How do you find out who is logged on to remote windows machines?

I'm using psloggedon at the moment, but it gives me only one computer at a time.

psloggeon \\172.21.0.5

Is there a better way how to scan a whole subnet ? Preferably some GUI application.

Answer 1

not a GUI, but:

for /L %x in (2,1,254) do psloggedon \\172.21.0.%x

will do a scan from 172.21.0.2-254. You can also nest:

for /L %z in (16,1,31) do for /L %x in (1,1,254)  do psloggedon \\172.21.%y.%x

This will scan the 172.21.{16-31}.x subnets.

Answer 2

I found this script. It scans a whole domain and gives you a nice output (computer name and user name).

whoisloggedinwhere.bat > users.txt

@echo off
setlocal
for /f "Tokens=1" %%c in ('net view /domain:"%USERDOMAIN%"^|Findstr /L /C:"\\"') do (
 for /f "Tokens=*" %%u in ('PsLoggedOn -L %%c^|find /i "%USERDOMAIN%\"') do (
  call :report %%c "%%u"
 )
)
endlocal
goto :EOF
:report
set work=%1
set comp=%work:~2%
set user=%2
set user=%user:"=%
call set user=%%user:*%USERDOMAIN%\=%%
@echo %comp% %user%

This script uses PsLoggedOn.

Answer 3

Try nbtstat -a <computername>

Answer 4

I write the user name into the computer description property using a logon script, which lets me see everything in AD Users & Computers, do searches on it, and so on. Very handy.

Answer 5

If the servers are running Terminal Services, you can use Terminal Services Manager to view the servers in a domain and who is logged on to them. It is GUI and can be found under

Start -> Administrative Tools -> Terminal Services Manager

Answer 6

qwinsta is another dos command, but it'll still only give you one at a time...

C:\>qwinsta /server:test_srv
 SESSIONNAME       USERNAME                 ID  STATE   TYPE        DEVICE
 console           test_usr                  0  Active  wdcon
 rdp-tcp                                 65536  Listen  rdpwd

Answer 7

You can detect a user being locally logged on to a workstation by querying WMI through the following PowerShell script. It returns the name of whoever is logged on locally or the empty string.

function logged_in($host_name) {
    (get-wmiobject -class Win32_ComputerSystem -computername $host_name `
        -namespace "root\CIMV2").UserName
}

Answer 8

I'm not sure where I got it but I have this code laying around that shows users on a machine. You can wrap this in a for each loop to scan a bunch of machines. I would say that if you want to know who's logged on to a system the simplest way is to turn on login auditing and look at (or query) the security log. Here's the code to see who's on at any given moment:

' PARAMETERS
'
strComputer = "machineName"   ' use "." for local computer 
strUser = "domain\user" ' comment this line for current user
strPassword = "password" ' comment this line for current user

' CONSTANTS
'
wbemImpersonationLevelImpersonate = 3
wbemAuthenticationLevelPktPrivacy = 6

'=======================================================================
' MAIN
'=======================================================================

' Connect to machine
'
If Not strUser = "" Then

    ' Connect using user and password
    '
    Set objLocator = CreateObject("WbemScripting.SWbemLocator")
    Set objWMI = objLocator.ConnectServer _
        (strComputer, "root\cimv2", strUser, strPassword)
    objWMI.Security_.ImpersonationLevel = wbemImpersonationLevelImpersonate
    objWMI.Security_.AuthenticationLevel = wbemAuthenticationLevelPktPrivacy

Else

    ' Connect using current user
    '
    Set objWMI = GetObject("winmgmts:{impersonationLevel=impersonate}!\\" & strComputer & "\root\cimv2") 

End If

' Get OS name
'
Set colOS = objWMI.InstancesOf ("Win32_OperatingSystem")

For Each objOS in colOS
    strName = objOS.Name
Next

If Instr(strName, "Windows 2000") > 0 Then

    '-------------------------------------------------------------------
    ' Code for Windows 2000
    '-------------------------------------------------------------------

    ' Get user name
    '
    Set colComputer = objWMI.ExecQuery("Select * from Win32_ComputerSystem")

    For Each objComputer in colComputer
        Wscript.Echo "User: " & objComputer.UserName
    Next

    ' ------------------------------------------------------------------

Else

    ' ------------------------------------------------------------------
    ' Code for Windows XP or later
    ' ------------------------------------------------------------------

    ' Get interactive session
    '
    Set colSessions = objWMI.ExecQuery _ 
          ("Select * from Win32_LogonSession Where LogonType = 2") 

    If colSessions.Count = 0 Then 
        ' No interactive session found
        '
        Wscript.Echo "No interactive user found" 
    Else 
        'Interactive session found
        '
        For Each objSession in colSessions 

            Set colList = objWMI.ExecQuery("Associators of " _ 
            & "{Win32_LogonSession.LogonId=" & objSession.LogonId & "} " _ 
            & "Where AssocClass=Win32_LoggedOnUser Role=Dependent" ) 

            ' Show user info
            '
            For Each objItem in colList 
                WScript.Echo "User: " & objItem.Name 
                WScript.Echo "FullName: " & objItem.FullName 
                WScript.Echo "Domain: " & objItem.Domain 
            Next 

            ' Show session start time
            '
            Wscript.Echo "Start Time: " & objSession.StartTime 
        Next 
    End If 

    ' ------------------------------------------------------------------

End If

'=======================================================================

Answer 9

I'm surprised nobody has mentioned loggedon2 yet, which I've been using for quite a few years. It's the GUI implementation you asked for and is available here.