30 May 2022

Enable/Disable Multiple RDP Sessions

So the caveat to this article is that this is specifically for Windows Servers. If you’re trying to enable multiple RDP sessions on Windows 10 or 11, you’ll need to do some further googling to find out how to do that – as this alone won’t be enough.

Enable Multiple RDP Sessions

  1. Log into the server you are trying to enable multiple Remote Desktop sessions on.
  2. Click on the start menu button, type “gpedit.msc” and open it.
  3. Navigate to ‘Computer Configuration’ -> ‘Administrative Templates’ -> ‘Windows Components’ -> ‘Remote Desktop Services’ -> ‘Remote Desktop Session Host’ -> ‘Connections’.
  4. Set “Restrict Remote Desktop Services user to a single Remote Desktop Services session” to ‘Disabled’.
  5. Double-click on “Limit number of connections” and set the value of the RD Maximum Connections allowed to ‘999999’.

Disable Multiple RDP Sessions

  1. Log into the server that allows multiple Remote Desktop sessions.
  2. Click on the start menu button, type “gpedit.msc” and open it.
  3. Navigate to ‘Computer Configuration’ -> ‘Administrative Templates’ -> ‘Windows Components’ -> ‘Remote Desktop Services’ -> ‘Remote Desktop Session Host’ -> ‘Connections’.
  4. Set “Restrict Remote Desktop Services user to a single Remote Desktop Services session” to ‘Enabled’.
26 May 2022

Disable IP autoconfiguration

I ran into this last week when I was helping someone “fix” their server. They couldn’t reach, or ping, their host, and when running an “ipconfig /all” command it was returning that the machine’s IP was ‘duplicate’.

Worth Noting: So sometimes when a server reports that its’ IP is a ‘duplicate’ it can be a DHCP mishap. It can happen when a server is assigned a static IP that is within a DHCP pool, and because there was no reservation, DHCP hands the IP out to some other machine. Thus two machines are trying to use the same, duplicate, IP address. When that happens you’ll need to resolve it by creating an IP reservation for the “correct” machine, and then releasing the IP from the machine that “incorrectly” took the IP from the pool so it can be assigned a new IP.

The machine I was fixing lived in a subnet that did not use DHCP and only had machines that were statically assigned their IPs in it. So the possible resolution mentioned above did not fit my scenario. So, what could it be? Well if you have a static IP set, and the DHCP service is enabled, Windows likes to give you an address on the 169.x.x.x network. Which just breaks the ip traffic on your server. Here’s how to fix it…

Step 1.

Open a command prompt

Step 2. Enter

"ipconfig /all"

Find what your system’s preferred IP is and if autoconfiguration is enabled, and the name of the interface that they are on. You will need this for the next step.

Step 3. Enter

netsh interface ipv4 show interface

Find the index number that is assigned to the interface you identified in the step above, you will need it in the next step.

Step 4.

Run the command below, but replace ’69’ with the index number that you identified in the step above.

netsh interface ipv4 set interface 69 dadtransmits=0 store=persistent

Step 5. Enter

services.msc

Disable the DHCP Client service. If you ever revert from a static IP back to a DHCP IP, you will need to re-enable this service and set it back to automatic.

Step 6.

Restart your computer.
After your system reboots, its static IP should now be the correct IP you had configured on it, and your IP traffic to/from it should be back to normal.

Congratulations, autoconfiguration has been disabled.

2 May 2022

Search GPO Settings

So if you know anything about managing Windows systems then you know about GPOs. In my honest opinion, GPOs are one of the greatest tools available in Windows. GPOs let you administratively manage all aspects of your computers. You can literally set about 99.9999% of any settings you ever wanted to configure on a computer.

One of the things that make GPOs so great is that it is expandable in that you can add new administrative templates as you add new software to your workstations in your domain. So not only can you manage just about any Microsoft or Windows setting, but you can also add in templates for third-party software from most of the big software venders and enterprise applications, as well as add new templates when new Microsoft releases new OSes and software.

The biggest downside of GPOs is that they can feel like a daunting wall when you first get started implementing them simply because there are sooo many settings that you can potentially configure – where to begin!?! And how do you figure out where to set some of those really odd settings. Well don’t worry, I don’t know anyone that remembers exactly where each setting is. For me, there are two resources that I regularly use to help me find the settings that I want to configure.

1 – https://gpsearch.azurewebsites.net/

This is an official Microsoft tool that lets you search all of the various settings that are available to you in all Microsoft products. It’s a great resource to find where things are set just by using a keyword. Think of it as “Bing” (or “Google”) for GPOs. Out of these two links, this site is the easiest to navigate when looking specifically for Microsoft and Windows settings.

2 – https://admx.help/

This site includes all of the Microsoft settings, but where it really shines is all of the third-party software settings it has indexed for you. If need to figure out where to set something in Chrome or Adobe or any other software, this site has you covered.

3 – https://reg2ps.azurewebsites.net/

So this last site is just a bonus as it is not exactly a GPO site, but it comes in handy. It’s a way to convert registry settings into powershell commands that you can run. Paste your reg key into it and it will spit out the corresponding PS command for it.

24 February 2022

Changing Your Password from an RDP Session

So here’s the scenario, you’ve RDP-ed into a server and you want to change your password. You try to hit CRTL+ATL+DEL but instead of it getting sent to the remote computer, it opens on your local machine. Blah! That is not what we want… How do we get to a place where we can change the password for the account that was used in the RDP session?

One way to send it within the RDP session is to launch the on-screen keyboard. To launch it, simply click on the ‘Start Menu’ and type “osk”, then click on the result to open the keyboard. With the OSK on screen, press and hold “CTRL+ALT” on your physical keyboard, and click “DEL” on the virtual keyboard button.

The easiest way to bring up the menu from where you can change your password is to press CRTL+ALT+END in the RDP window. Now if you are RDP-ed from a mac, you’ll need to do a CRTL+ALT+Fn+Backspace or CRTL+ALT+Fn+Right-Arrow to bring up the menu.

5 January 2022

Reset password on locked-out Domain Admin

Sometimes things happen and a password gets forgotten or lost, or in the worst case it wasn’t updated in your password management tool after it was changed. We’ve likely all had to bug another admin to reset our password for one system or another. It happens. But what happens if you are the lone Domain Admin and lock yourself out? Luckily, there is a way to get back in if you do get locked out.

  • Download the Windows Server 2016 ISO.
  • Attach the ISO to your DC virtual machine.
  • Reboot the VM into the ISO
  • Select: Repair your Computer -> Troubleshoot -> Command Prompt
  • At the command prompt, run the following commands:
cd c:\Windows\System32
ren osk.exe osk.old
copy c:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe osk.exe
  • Reboot the Server.
  • Launch the on-screen keyboard and PowerShell will open
  • At the Powershell prompt, run the following command, replacing <PASSWORD> with the password of your choice:
Net user Administrator <PASSWORD>
  • Revert file changes in your System32 folder, renaming ‘osk.old’ back to ‘osk.exe’.

And there you have it folks, you are now able to log back in with your Domain Admin account. This works because while the DC does not have a local Administrator account, it somehow realizes that and resets the Domain Admin. Yes it is a little bit of black magic fuckery in that regard… But it worked and got you back in, so who are we to complain.

1 January 2021

VMware PVSCSI on a new Windows install

If you haven’t already upgraded your Windows servers to Windows 2019, then you will probably be doing so soon enough. That means that it’s time to review the steps you take in building out your virtual machines (VMs). Are you running your VMs from a SAN? Then during this refresh, you should really take the time to consider using the VMware Paravirtual SCSI (PVSCSI) driver.

VMware Paravirtual (PVSCSI) adapters are high-performance storage adapters that can provide greater throughput and lower CPU utilization. They are best suited for environments where hardware or applications drive a very high amount of I/O throughput, such as SAN environments. PVSCSI adapters are not suited for DAS environments.

VMware, https://kb.vmware.com/s/article/1010398

When building new VMs there are four options you can choose from for their SCSI controller. The default LSI Logic SAS driver that is automatically selected for you will work just fine in most environments. That said, when you want to guarantee maximum performance from your VMs you will need to use the PVSCSI. Why wouldn’t you want to allow your VMs their max performance? It’s simple enough to do. Heck, do it and make a “golden image” template so you can easily redeploy it if you don’t want to repeat the steps on each VM everytime. It’s just a couple of clicks now for better performance later. Here we go…

  1. Launch the vSphere Client and log in to an ESXi host or vCenter Server.
  2. Select create a new virtual machine.
  3. In the vSphere Client, right-click on the virtual machine and click Edit Settings.
  4. Click the Hardware tab.
  5. Click Add.
  6. Select Hard Disk.
  7. Click Next.
  8. Choose any one of the available options.
  9. Click Next.
  10. Specify the options you require. Options vary depending on which type of disk you chose.
  11. Choose a Virtual Device Node and specify whether you want to use Independent mode. For data disks, choose a Virtual Device Node between SCSI (1:0)to SCSI (3:15). For a boot disk, choose Virtual Device Node SCSI (0:0) or choose the Virtual Device Node that boots in the order you require.

    Note: To set a disk to use Independent mode there must be no snapshots associated to the virtual disk, if there are existing snapshots commit them before changing the disk type.
     
  12. Click Next.
  13. Click Finish to complete the process and exit the Add Hardware wizard. A new disk and controller are created.
  14. Select the newly created controller and click Change Type.
  15. Click VMware Paravirtual and click OK.
  16. Click OK to exit the Virtual Machine Properties dialog.
  17. Power on the virtual machine.
  18. Install VMware Tools. VMware Tools includes the PVSCSI driver.
  19. If it is a new virtual disk, scan and format the hard disk within the guest operating system.
17 April 2020

RDS customizations

This is a bit of a long post, so I apologize in advance… Sorry, but not sorry. There are a lot of things that you can customize in a RDS / RD Web Access deployment.

I’m doing these edits, or customizations on a Windows Server 2019 deployment, they should [in theory] work though on RDS deployments as far back as Windows Server 2012/R2, though your mileage may vary – see disclaimer below.

Standard disclaimer… Make sure to backup folders and files before you start making changes. I’m not responsible for anything you break, you’ve been warned.


Eliminate “/RDWeb” from the RDS URL

When adding the RD Web Access role on your remote desktop gateway or broker, it will auto-magically create the RDWeb website in IIS for you.

RDS sets up the the url for your site in the following format: “rds.playswellwithflavors.com/RDWeb” or “example.com/RDWeb”. However, you likely are not using this IIS host to serve up any other webpages other that RDS Web Access… So you probably want to eliminate the need for user to have to enter that “/RDWeb” at the end of the url. And make it appear as just “rds.playswellwithflavors.com” or “example.com”.

Microsoft makes this very easy to accomplish with a simple redirect in IIS.

  • Open IIS.
  • Click on the ‘Default Web Site’ in the left-side pane.
  • Click on ‘HTTP Redirect’ in right-side pane.
  • Check the box for ‘Redirect requests to this destination’.
    Enter in the field under it: /RDWeb
  • Click ‘Apply’.
  • Restart IIS
  • Test your website to confirm that you can reach it with the base url, without the “/RDWeb” appended at the end.

Password Reset Link

This customization will edit the Web Access Login Page to add a password reset link where users can change their AD passwords from the main login page.

  • Open IIS
  • In the left-hand pane, drill down into “Server”->”Sites”->”Default Site”->”RDWeb”->”Pages”
  • Double-click on “Application Settings” in the right-hand pane.
  • Find the value “PasswordChangeEnabled” and double-click on it. Edit it to ‘True’.
  • Click ‘Ok’.

Now that we edited that value to ‘true’, if the user’s password expires they will be prompted to change their password. That’s handy, right!?
Well, if you liked that, then let me tell you that it is possible to go one step further and make a link on the main page for them to reset their password, anytime.

  • Open the following folder: %windir%\Web\RDWeb\
  • Since we are going to be editing stuff here, make a backup copy of the “Pages” folder.
  • Now open the folder: %windir%\Web\RDWeb\Pages\en-US\
  • Right-click on the file “login.aspx” and select ‘Edit’.
  • With the file open, press “Ctrl+F” and then search for “userpass”.
  • Scroll down under the table that “userpass” is in. This is where we want to add our password reset link. Copy the code below and paste it into your file, then save and close it.
<tr>
<td align="right">
Click <a href="password.aspx" target="_blank">here</a> to reset your password.
</td>
</tr>
  • Reload the page in your browser to view the password reset link.

Change “Domain\user name” to “Email”

At the Web Access login page, I like to change the prompt for “Domain\user name” to “Email Address”. Call me cynical, but I find that users can remember their email address, but will almost always call and ask what to put as the domain. I like to just change this to what the user will understand and prevent them from needing to call me.

  • Now open the folder: %windir%\Web\RDWeb\Pages\en-US\
  • Make sure that you have already made a backup copy of the “Pages” folder.
  • Right-click on the file “login.aspx” and select ‘Edit’.
  • Look for “L_DomainUserNameLabel_Text” on line 21.
  • Change the value “Domain\\user name:” to “Email Address:”.
  • Look for “L_DomainNameMissingLabel_Text” on line 30.
  • Change the value “You must enter a valid domain name.” to “You must enter a valid email address.”
  • Save and close the file.
  • Reload the page in your browser to view the change.

Change the “Work Resources” text on the Login page

This will let you customize the text displayed with your logo in the upper left corner of the RDWeb login page.

  • Open an administrator PowerShell window on the RD Connection Broker.
  • Enter the following command: Set-RDWorkspace -Name "<YourBrandingHere>"
  • Reload the page in your browser to view the change.

Changing the RD Logos

You can brand your RD Web Access page with your company logo. There are two logos you can change. One is in the upper left corner, and the other one is smaller and in the upper right corner.

  • Take your logo image and resize it into two .png files with the names and dimensions specified below;
    • logo_01.png – 16pixels x 16pixels
    • logo_02.png – 48pixels x 48pixels
  • Now open the folder: %windir%\Web\RDWeb\Pages\images\
  • Make sure that you have already made a backup copy of the “Pages” folder.
  • Copy and paste the your logo image files into this folder.
  • Open IIS and restart the service.
  • Reload the page in your browser to view the change.
  • The “logo_01.png” file will replace the icon in the upper right corner.
  • The “logo_02.png” file will replace the icon in the upper left corner.

Change the “To protect against” message

This is the message on the login page that is beneath the “Sign In” button. You can customize it to your own message.

  • Now open the folder: %windir%\Web\RDWeb\Pages\en-US\
  • Make sure that you have already made a backup copy of the “Pages” folder.
  • Right-click on the file “login.aspx” and select ‘Edit’.
  • Look for “L_TSWATimeoutLabel_Text” on line 43.
  • Modify that value there to include your custom message.
  • Save and close the file.
  • Reload the page in your browser to view the change.

Change the RD Workspace name and other text

You can customize other text displayed on your RDWeb login page. Things like the page title and other small branding type changes…

  • Now open the folder: %windir%\Web\RDWeb\Pages\en-US\
  • Make sure that you have already made a backup copy of the “Pages” folder.
  • Right-click on the file “RDWAStrings.xml” and select ‘Edit’.
  • Make changes as desired to reflect what you want displayed;
    • PageTitle, line 3
    • HeadingRDWA, line 10
    • HeadingApplicationName, line 11
    • Help, line 12
  • Reload the page in your browser to view the change.
    • Note: Chrome based browsers like to cache these… Use a private browsing tab, or flush your browser cache if the changes are not appearing after reloading the page.

Remove ‘Help’ Link

This will remove the ‘Help’ link on the RDWeb login page that links to this MS documentation.

  • Now open the folder: %windir%\Web\RDWeb\Pages\
  • Make sure that you have already made a backup copy of the “Pages” folder.
  • Right-click on the file “site.xsl” and select ‘Edit’.
  • Press ‘Ctrl+G’ and enter 150, to go to line 150
  • Select and then delete lines 150-158.
  • Open IIS and restart the service.
  • Reload the page in your browser to view the change.

Change the Server Logo on Login Page

You can remove the “Server 2012” or “Server 2016” or “Server 2019” logo that is on the login page. I like to replace it with a 1px-by-1px transparent image. It won’t do much overall… But perhaps it’ll make a malicious person have to work a tad bit harder to determine what you’re OS you are on.

  • Replace the following image: %windir%\web\rdweb\pages\images\WS_h_c.png

Change the Microsoft Logo on Login Page

You can remove the “Microsoft” logo that is on the login page. I like to replace it with a 1px-by-1px transparent image. It doesn’t hurt anything being there, but if you’re cleaning up and editing the branding of your site, why would you leave this logo on it?

  • Replace the following image: %windir%\web\rdweb\pages\images\mslogo_black.png

If I come across other customization tips I’ll add them here…

9 April 2020

Setup BGInfo on Windows

BGinfo is a great utility/tool that I really like and I literally have on every server I deploy. It is totally customize-able and able to display whatever system information that you feel is important to you, right on the desktop background making it easy to see at a glance. It could be used to display anything from the server’s name, IP addresses, hard drive usage, memory usage, OS version, or even the user that you are currently logged in as.


Download BgInfo – https://docs.microsoft.com/en-us/sysinternals/downloads/bginfo

Create a folder, c:\utilities\, and make sure that all users have read and write access to it.

Move the BGInfo utility into the c:\utilities\ folder.
I also like to place any other Sysinternals utilities that I am using into this c:\utilities\ folder.

Run the BGinfo utility and take a few minutes to configure what information you wish to be displayed on your background.
Then save your configuration to the c:\utilities\ folder.

Create a shortcut to either Bginfo.exe (if you are on a 32-bit machine) or Bginfo64.exe (if are on a 64-bit machine).

Edit the target of that shortcut to include the name of your BGinfo configuration file.
In the picture below I’ve named mine “c:\utilities\mybgconfig.bgi”.

A few more handy suggestions to include in your shortcut’s target are:

  • /timer:0 – to avoid the typical UI popup
  • /nolicprompt – to make sure new users are not prompted with the EULA
  • /silent – to silence and errors

Which would result with the target field looking like:

c:\utilities\Bginfo64.exe c:\utilities\mybgconfig.bgi /timer:0 /nolicprompt /silent

Follow my article about finding the startup folder in Windows, and make a copy of your shortcut into that startup folder.
I prefer to copy the shortcut to the “Common Startup” folder, that way it will launch for any user that logs into the machine… But it’s up to you if you want to put it in the “User Startup” or “Common Startup” folder.

Now it’s time to test it out! Try logging out and then logging back in.

9 April 2020

Finding the Startup Folder on Windows

In recent years Microsoft has moved around where they “hide” the startup folder. That’s the folder that gets used to launch applications that start automatically when the user logs in. It’s not necessary hard to find, but it is well hidden.

There’s actually two places that startup folder lives. Each user has their own startup folder that will launch programs specific to that user. And there is also a common startup folder which will launch programs for any and all users that log into that machine.


How to find the users’ individual startup folder

  • Right click on the start menu and select ‘Run’.
  • Type “shell:startup” and click ok.
  • The startup folder will open, and you can drag-and-drag and shortcuts or applications you need into.

If you need to manually dive thru folders to get to the user’s startup folder, go to, but remember to change “<USER>” to the one you’re looking for:

C:\Users\<USER>\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup

How to find the all users’ common startup folder

  • Right click on the start menu and select ‘Run’.
  • Type “shell:common startup” and click ok.
  • The startup folder will open, and you can drag-and-drag and shortcuts or applications you need into.

If you need to manually dive thru folders to get to the common startup folder, go to:

C:\ProgramData\Microsoft\Windows\Start Menu\Programs\StartUp
4 April 2020

Run Application as Different User

Windows makes it incredibly easy to run an application or script as another user on your computer. I find that I most often use this to run administrative or domain tools, when I’m logged in as just a normal user.

Method 1

This is the easiest method. While it took me a little while to remember it, I now use it almost daily and without even thinking about it.

Press and hold down the ‘Shift’ key on your keyboard, while you right-click on the program you want to launch.

This will only work on executable (EXE) files or shortcuts to executable files. If you try this and don’t see the option, then it is not an executable file.

Method 2

This method will create a shortcut that “knows” to launch an application as another user.

Create a shortcut to your executable

Right-click on the shortcut and modify the “Target” to:

runas /user:DOMAIN\USERNAME "path to executable"

Click ‘OK’. Then launch your shortcut. You will get prompted for your password everytime you launch your shortcut.

If you need to store the password with your shortcut, then modify the “Target” to this instead:

runas /savecred /user:DOMAIN\USERNAME "path to executable"

Click ‘OK’. Then right-click and select “Run as Administrator” the first time you use the shortcut. You will be prompted for the user password and it will get saved. From then on, just clicking the shortcut will launch it as your desired user.

Method 2.5

Alright this is basically the same method as above, so I didn’t feel right calling it a third method.

You can take the same trick from “Method 2” and just use it to run an application from a command prompt window.

C:\> runas /user:DOMAIN\USERNAME "path to executable"