Security best practices for Retail Cloud POS in a shared environment

Important

This topic applies to Dynamics 365 for Retail and Dynamics 365 for Finance and Operations, Enterprise edition.

Retail Cloud POS is a web application that runs in the context of a browser. This topic provides recommendations that can help secure Retail Cloud POS in a shared environment.

Background

Retail Cloud POS is a web application that runs in the context of a web browser. Therefore, it's vulnerable to attack when a user can run any script in the context of the web application. One requirement for such attacks is that the user must have physical access to the computer, either in person or by using Remote Desktop Connection. Vulnerability to attack is an existing issue in most browsers that provide developer tools, and that enable scripts to be run without sufficient privilege control. Because the web application will have little influence over its hosting environment, one way to mitigate security issues is to add defense-in-depth. The defense-in-depth can be built by taking advantage of the restrictive policies of both the browser and the operating system.

Hardening instructions for a Retail Cloud POS computer

Here are some of the defense-in-depth recommendations for the operating system and/or browser that will have an activated instance of Retail Cloud POS. The settings should be enabled or set by a high-privileged account for the operating system. Retail Cloud POS should be used by a low-privileged account that can't override those settings. We recommend that you enable all the following settings. Otherwise, you could create a security loophole that will be prone to security exploitation.

  • Required - Disable script execution in the browser's address bar.
  • Required - Disable the browser's developer console.
  • Required - Retail Cloud POS should be accessed by a low-privileged user.
  • Required - Set up group policies to enable a kiosk session.
  • Recommended - Set up a proxy to access only whitelisted websites.

Disable script execution in the address bar of the browser that runs Retail Cloud POS

Internet Explorer

There is no option to disable script execution in the address bar in Internet Explorer. One alternative is to hide the address bar itself.

  1. Create a shortcut for the Retail Cloud POS URL, and copy it to each store worker's Microsoft Windows desktop.
  2. Run regedit.exe to change the registry to disable the Internet Explorer address bar. [HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Internet Explorer\ToolBars\Restrictions] "NoNavBar"=dword:00000001

Microsoft Edge

By design, Microsoft Edge prevents script execution in the address bar. Therefore, no action is required.

Disable the developer console in the browser that runs Retail Cloud POS

Internet Explorer

Use Group Policy Editor to enable the following group policy to disable the Internet Explorer developer console: \Administrative Templates\Windows Components\Internet Explorer\Toolbars\Turn off Developer Tools="Enabled"

Microsoft Edge

Run regedit.exe to change the registry to disable the developer console. [HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\MicrosoftEdge\F12] "AllowDeveloperTools"=dword:00000000

Retail Cloud POS should be accessed by a low-privileged user

A point of sale (POS) user must be a non-administrative account that doesn't have privileges to change applied policies.

Set up group policies to enable a kiosk session

We recommend that you apply the following restrictions for Retail Cloud POS users:

  • Restrict access to the file system.
  • Restrict access to Control Panel.
  • Restrict access to removable drives.
  • Restrict access to shells that run commands.
  • Restrict access to the registry.
  • Restrict access to application management.

The following table lists the group policies to enable kiosk mode. The set of policies requires that you start your browser at the sign-in script. These policies can be adjusted to your requirements. You should always assess any security implications or talk to a specialist.

Setting State Comment Path
Enable screen saver Disabled No \Control Panel\Personalization
Allow DFS roots to be published Disabled No \Shared Folders
Allow shared folders to be published Disabled No \Shared Folders
Add Search Internet link to Start Menu Disabled No \Start Menu and Taskbar
Show Quick Launch on Taskbar Disabled No \Start Menu and Taskbar
Show the Apps view automatically when the user goes to Start Disabled No \Start Menu and Taskbar
Show "Run as different user" command on Start Disabled No \Start Menu and Taskbar
Add the Run command to the Start Menu Disabled No \Start Menu and Taskbar
Show Start on the display the user is using when they press the Windows logo key Disabled No \Start Menu and Taskbar
Show Windows Store apps on the taskbar Disabled No \Start Menu and Taskbar
Turn off shell protocol protected mode Disabled No \Windows Components\File Explorer
Turn on menu bar by default Disabled No \Windows Components\Internet Explorer
Turn on Script Execution Disabled No \Windows Components\Windows PowerShell
Hide the "Add a program from CD-ROM or floppy disk" option Enabled No \Control Panel\Add or Remove Programs
Hide the "Add programs from Microsoft" option Enabled No \Control Panel\Add or Remove Programs
Hide the "Add programs from your network" option Enabled No \Control Panel\Add or Remove Programs
Hide Add New Programs page Enabled No \Control Panel\Add or Remove Programs
Remove Add or Remove Programs Enabled No \Control Panel\Add or Remove Programs
Hide the Set Program Access and Defaults page Enabled No \Control Panel\Add or Remove Programs
Hide Change or Remove Programs page Enabled No \Control Panel\Add or Remove Programs
Go directly to Components Wizard Enabled No \Control Panel\Add or Remove Programs
Remove Support Information Enabled No \Control Panel\Add or Remove Programs
Hide Add/Remove Windows Components page Enabled No \Control Panel\Add or Remove Programs
Disable the Display Control Panel Enabled No \Control Panel\Display
Hide Settings tab Enabled No \Control Panel\Display
Prevent changing color scheme Enabled No \Control Panel\Personalization
Prevent changing theme Enabled No \Control Panel\Personalization
Prevent changing visual style for windows and buttons Enabled No \Control Panel\Personalization
Prohibit selection of visual style font size Enabled No \Control Panel\Personalization
Prevent changing color and appearance Enabled No \Control Panel\Personalization
Prevent changing desktop background Enabled No \Control Panel\Personalization
Prevent changing desktop icons Enabled No \Control Panel\Personalization
Prevent changing mouse pointers Enabled No \Control Panel\Personalization
Prevent changing screen saver Enabled No \Control Panel\Personalization
Prevent changing sounds Enabled No \Control Panel\Personalization
Prevent addition of printers Enabled No \Control Panel\Printers
Prevent deletion of printers Enabled No \Control Panel\Printers
Hide "Set Program Access and Computer Defaults" page Enabled No \Control Panel\Programs
Hide "Get Programs" page Enabled No \Control Panel\Programs
Hide "Installed Updates" page Enabled No \Control Panel\Programs
Hide "Programs and Features" page Enabled No \Control Panel\Programs
Hide the Programs Control Panel Enabled No \Control Panel\Programs
Hide "Windows Features" Enabled No \Control Panel\Programs
Hide "Windows Marketplace" Enabled No \Control Panel\Programs
Turn off automatic learning Enabled No \Control Panel\Regional and Language Options\Handwriting personalization
Hide Regional and Language Options administrative options Enabled No \Control Panel\Regional and Language Options
Hide and disable all items on the desktop Enabled No \Desktop
Remove the Desktop Cleanup Wizard Enabled No \Desktop
Hide Internet Explorer icon on desktop Enabled No \Desktop
Remove Computer icon on the desktop Enabled No \Desktop
Remove My Documents icon on the desktop Enabled No \Desktop
Hide Network Locations icon on desktop Enabled No \Desktop
Remove Properties from the Computer icon context menu Enabled No \Desktop
Remove Properties from the Documents icon context menu Enabled No \Desktop
Do not add shares of recently opened documents to Network Locations Enabled No \Desktop
Remove Recycle Bin icon from desktop Enabled No \Desktop
Remove Properties from the Recycle Bin context menu Enabled No \Desktop
Do not save settings at exit Enabled No \Desktop
Turn off Aero Shake window minimizing mouse gesture Enabled No \Desktop
Prevent adding, dragging dropping and closing the Taskbar's toolbars Enabled
Prohibit adjusting desktop toolbars Enabled No \Desktop
Force Start to be either full screen size or menu size Enabled No \Start Menu and Taskbar
Go to the desktop instead of Start when signing in Enabled No \Start Menu and Taskbar
Turn off personalized menus Enabled No \Start Menu and Taskbar
Lock the Taskbar Enabled No \Start Menu and Taskbar
Turn off notification area cleanup Enabled No \Start Menu and Taskbar
Remove Balloon Tips on Start Menu items Enabled No \Start Menu and Taskbar
Prevent users from customizing their Start Screen Enabled No \Start Menu and Taskbar
Remove common program groups from Start Menu Enabled No \Start Menu and Taskbar
Remove Favorites menu from Start Menu Enabled No \Start Menu and Taskbar
Remove Search link from Start Menu Enabled No \Start Menu and Taskbar
Remove frequent programs list from the Start Menu Enabled No \Start Menu and Taskbar
Remove Games link from Start Menu Enabled No \Start Menu and Taskbar
Remove Help menu from Start Menu Enabled No \Start Menu and Taskbar
Turn off user tracking Enabled No \Start Menu and Taskbar
Remove All Programs list from the Start menu Enabled No \Start Menu and Taskbar
Remove Network Connections from Start Menu Enabled No \Start Menu and Taskbar
Remove pinned programs list from the Start Menu Enabled No \Start Menu and Taskbar
Do not keep history of recently opened documents Enabled No \Start Menu and Taskbar
Remove Recent Items menu from Start Menu Enabled No \Start Menu and Taskbar
Do not use the search-based method when resolving shell shortcuts Enabled No \Start Menu and Taskbar
Do not use the tracking-based method when resolving shell shortcuts Enabled No \Start Menu and Taskbar
Remove Run menu from Start Menu Enabled No \Start Menu and Taskbar
Remove Default Programs link from the Start menu. Enabled No \Start Menu and Taskbar
Remove Documents icon from Start Menu Enabled No \Start Menu and Taskbar
Remove Music icon from Start Menu Enabled No \Start Menu and Taskbar
Remove Network icon from Start Menu Enabled No \Start Menu and Taskbar
Remove Pictures icon from Start Menu Enabled No \Start Menu and Taskbar
Do not search communications Enabled No \Start Menu and Taskbar
Remove Search Computer link Enabled No \Start Menu and Taskbar
Remove See More Results / Search Everywhere link Enabled No \Start Menu and Taskbar
Do not search for files Enabled No \Start Menu and Taskbar
Do not search Internet Enabled No \Start Menu and Taskbar
Do not search programs and Control Panel items Enabled No \Start Menu and Taskbar
Remove programs on Settings menu Enabled No \Start Menu and Taskbar
Prevent changes to Taskbar and Start Menu Settings Enabled No \Start Menu and Taskbar
Remove Downloads link from Start Menu Enabled No \Start Menu and Taskbar
Remove Homegroup link from Start Menu Enabled No \Start Menu and Taskbar
Remove Recorded TV link from Start Menu Enabled No \Start Menu and Taskbar
Remove user's folders from the Start Menu Enabled No \Start Menu and Taskbar
Remove Videos link from Start Menu Enabled No \Start Menu and Taskbar
Force classic Start Menu Enabled No \Start Menu and Taskbar
Remove Clock from the system notification area Enabled No \Start Menu and Taskbar
Prevent grouping of taskbar items Enabled No \Start Menu and Taskbar
Do not display any custom toolbars in the taskbar Enabled No \Start Menu and Taskbar
Remove access to the context menus for the taskbar Enabled No \Start Menu and Taskbar
Hide the notification area Enabled No \Start Menu and Taskbar
Prevent users from uninstalling applications from Start Enabled No \Start Menu and Taskbar
Remove user folder link from Start Menu Enabled No \Start Menu and Taskbar
Remove user name from Start Menu Enabled No \Start Menu and Taskbar
Remove links and access to Windows Update Enabled No \Start Menu and Taskbar
Remove the "Undock PC" button from the Start Menu Enabled No \Start Menu and Taskbar
Remove Notifications and Action Center Enabled No \Start Menu and Taskbar
Disable showing balloon notifications as toasts. Enabled No \Start Menu and Taskbar
Remove the Security and Maintenance icon Enabled No \Start Menu and Taskbar
Remove the networking icon Enabled No \Start Menu and Taskbar
Remove the battery meter Enabled No \Start Menu and Taskbar
Remove the volume control icon Enabled No \Start Menu and Taskbar
Turn off feature advertisement balloon notifications Enabled No \Start Menu and Taskbar
Do not allow pinning Store app to the Taskbar Enabled No \Start Menu and Taskbar
Do not allow pinning items in Jump Lists Enabled No \Start Menu and Taskbar
Do not allow pinning programs to the Taskbar Enabled No \Start Menu and Taskbar
Do not display or track items in Jump Lists from remote locations Enabled No \Start Menu and Taskbar
Turn off automatic promotion of notification icons to the taskbar Enabled No \Start Menu and Taskbar
Lock all taskbar settings Enabled No \Start Menu and Taskbar
Prevent users from adding or removing toolbars Enabled No \Start Menu and Taskbar
Prevent users from rearranging toolbars Enabled No \Start Menu and Taskbar
Do not allow taskbars on more than one display Enabled No \Start Menu and Taskbar
Turn off all balloon notifications Enabled No \Start Menu and Taskbar
Remove pinned programs from the Taskbar Enabled No \Start Menu and Taskbar
Prevent users from moving taskbar to another screen dock location Enabled No \Start Menu and Taskbar
Prevent users from resizing the taskbar Enabled No \Start Menu and Taskbar
Turn off taskbar thumbnails Enabled No \Start Menu and Taskbar
Remove Task Manager Enabled No \System\Ctrl+Alt+Del Options
Code signing for device drivers Enabled No \System\Driver Installation
Turn off Windows Update device driver search prompt Enabled No \System\Driver Installation
Disallow selection of Custom Locales Enabled No \System\Locale Services
Disallow changing of geographic location Enabled No \System\Locale Services
Disallow user override of locale settings Enabled No \System\Locale Services
CD and DVD: Deny read access Enabled No \System\Removable Storage Access
CD and DVD: Deny write access Enabled No \System\Removable Storage Access
Floppy Drives: Deny read access Enabled No \System\Removable Storage Access
Floppy Drives: Deny write access Enabled No \System\Removable Storage Access
Removable Disks: Deny read access Enabled No \System\Removable Storage Access
Removable Disks: Deny write access Enabled No \System\Removable Storage Access
All Removable Storage classes: Deny all access Enabled No \System\Removable Storage Access
Tape Drives: Deny read access Enabled No \System\Removable Storage Access
Tape Drives: Deny write access Enabled No \System\Removable Storage Access
WPD Devices: Deny read access Enabled No \System\Removable Storage Access
WPD Devices: Deny write access Enabled No \System\Removable Storage Access
Prevent access to the command prompt Enabled No \System
Prevent access to registry editing tools Enabled No \System
Prevent the wizard from running. Enabled No \Windows Components\Add features to Windows 10
Turn off Program Compatibility Assistant Enabled No \Windows Components\Application Compatibility
Search, Share, Start, Devices and Settings don't appear when the mouse is pointing to the upper-right corner of the screen Enabled No \Windows Components\Edge UI
Disable help tips Enabled No \Windows Components\Edge UI
Turn off tracking of app usage Enabled No \Windows Components\Edge UI
Do not show recent apps when the mouse is pointing to the upper-left corner of the screen Enabled No \Windows Components\Edge UI
Prevent users from replacing the Command Prompt with Windows PowerShell in the menu they see when they right-click the lower-left corner or press the Windows logo key+X Enabled No \Windows Components\Edge UI
Turn off switching between recent apps Enabled No \Windows Components\Edge UI
Turn on or off details pane Enabled No \Windows Components\File Explorer\Explorer Frame Pane
Turn off Preview Pane Enabled No \Windows Components\File Explorer\Explorer Frame Pane
Do not display the Welcome Center at user logon Enabled No \Windows Components\File Explorer
Turn on Classic Shell Enabled No \Windows Components\File Explorer
Remove CD Burning features Enabled No \Windows Components\File Explorer
Remove DFS tab Enabled No \Windows Components\File Explorer
Hide these specified drives in My Computer Enabled No \Windows Components\File Explorer
No Entire Network in Network Locations Enabled No \Windows Components\File Explorer
Remove File menu from File Explorer Enabled No \Windows Components\File Explorer
Do not allow Folder Options to be opened from the Options button on the View tab of the ribbon Enabled No \Windows Components\File Explorer
Remove Hardware tab Enabled No \Windows Components\File Explorer
Hide the Manage item on the File Explorer context menu Enabled No \Windows Components\File Explorer
Remove Shared Documents from My Computer Enabled No \Windows Components\File Explorer
Remove "Map Network Drive" and "Disconnect Network Drive" Enabled No \Windows Components\File Explorer
Remove the Search the Internet "Search again" link Enabled No \Windows Components\File Explorer
Remove Security tab Enabled No \Windows Components\File Explorer
Remove Search button from File Explorer Enabled No \Windows Components\File Explorer
Remove File Explorer's default context menu Enabled No \Windows Components\File Explorer
Prevent access to drives from My Computer Enabled No \Windows Components\File Explorer
Turn off Windows+X hotkeys Enabled No \Windows Components\File Explorer
No Computers Near Me in Network Locations Enabled No \Windows Components\File Explorer
Request credentials for network installations Enabled No \Windows Components\File Explorer
Prevent users from adding files to the root of their Users Files folder. Enabled No \Windows Components\File Explorer
Turn off Accelerators Enabled No \Windows Components\Internet Explorer\Accelerators
File menu: Disable closing the browser and Explorer windows Enabled No \Windows Components\Internet Explorer\Browser menus
File menu: Disable Save As... menu option Enabled No \Windows Components\Internet Explorer\Browser menus
File menu: Disable Save As Web Page Complete Enabled No \Windows Components\Internet Explorer\Browser menus
File menu: Disable New menu option Enabled No \Windows Components\Internet Explorer\Browser menus
File menu: Disable Open menu option Enabled No \Windows Components\Internet Explorer\Browser menus
Help menu: Remove 'Send Feedback' menu option Enabled No \Windows Components\Internet Explorer\Browser menus
Help menu: Remove 'For Netscape Users' menu option Enabled No \Windows Components\Internet Explorer\Browser menus
Help menu: Remove 'Tip of the Day' menu option Enabled No \Windows Components\Internet Explorer\Browser menus
Help menu: Remove 'Tour' menu option Enabled No \Windows Components\Internet Explorer\Browser menus
Turn off Shortcut Menu Enabled No \Windows Components\Internet Explorer\Browser menus
Hide Favorites menu Enabled No \Windows Components\Internet Explorer\Browser menus
Disable Open in New Window menu option Enabled No \Windows Components\Internet Explorer\Browser menus
Turn off Print Menu Enabled No \Windows Components\Internet Explorer\Browser menus
Turn off the ability to launch report site problems using a menu option Enabled No \Windows Components\Internet Explorer\Browser menus
Disable Save this program to disk option Enabled No \Windows Components\Internet Explorer\Browser menus
Tools menu: Disable Internet Options... menu option Enabled No \Windows Components\Internet Explorer\Browser menus
View menu: Disable Full Screen menu option Enabled No \Windows Components\Internet Explorer\Browser menus
View menu: Disable Source menu option Enabled No \Windows Components\Internet Explorer\Browser menus
Turn off Developer Tools Enabled No \Windows Components\Internet Explorer\Toolbars
Turn off toolbar upgrade tool Enabled No \Windows Components\Internet Explorer\Toolbars
Hide the Command bar Enabled No \Windows Components\Internet Explorer\Toolbars
Hide the status bar Enabled No \Windows Components\Internet Explorer\Toolbars
Disable customizing browser toolbars Enabled No \Windows Components\Internet Explorer\Toolbars
Disable customizing browser toolbar buttons Enabled No \Windows Components\Internet Explorer\Toolbars
Turn off add-on performance notifications Enabled No \Windows Components\Internet Explorer
Do not allow users to enable or disable add-ons Enabled No \Windows Components\Internet Explorer
Disable changing Advanced page settings Enabled No \Windows Components\Internet Explorer
Turn off Favorites bar Enabled No \Windows Components\Internet Explorer
Prevent per-user installation of ActiveX controls Enabled No \Windows Components\Internet Explorer
Turn off Reopen Last Browsing Session Enabled No \Windows Components\Internet Explorer
Turn off Tab Grouping Enabled No \Windows Components\Internet Explorer
Prevent managing the phishing filter Enabled No \Windows Components\Internet Explorer
Turn off Managing SmartScreen Filter for Internet Explorer 8 Enabled No \Windows Components\Internet Explorer
Prevent managing SmartScreen Filter Enabled No \Windows Components\Internet Explorer
Turn off the Security Settings Check feature Enabled No \Windows Components\Internet Explorer
Enforce full-screen mode Enabled No \Windows Components\Internet Explorer
Disable Import/Export Settings wizard Enabled No \Windows Components\Internet Explorer
Prevent Internet Explorer Search box from appearing Enabled No \Windows Components\Internet Explorer
Turn off Quick Tabs functionality Enabled No \Windows Components\Internet Explorer
Turn off tabbed browsing Enabled No \Windows Components\Internet Explorer
Disable changing Automatic Configuration settings Enabled No \Windows Components\Internet Explorer
Disable changing Temporary Internet files settings Enabled No \Windows Components\Internet Explorer
Disable changing Calendar and Contact settings Enabled No \Windows Components\Internet Explorer
Disable changing certificate settings Enabled No \Windows Components\Internet Explorer
Disable changing default browser check Enabled No \Windows Components\Internet Explorer
Disable changing color settings Enabled No \Windows Components\Internet Explorer
Disable changing connection settings Enabled No \Windows Components\Internet Explorer
Disable changing font settings Enabled No \Windows Components\Internet Explorer
Disable changing language settings Enabled No \Windows Components\Internet Explorer
Disable changing link color settings Enabled No \Windows Components\Internet Explorer
Disable changing Messaging settings Enabled No \Windows Components\Internet Explorer
Prevent managing pop-up exception list Enabled No \Windows Components\Internet Explorer
Turn off pop-up management Enabled No \Windows Components\Internet Explorer
Disable changing Profile Assistant settings Enabled No \Windows Components\Internet Explorer
Prevent changing proxy settings Enabled No \Windows Components\Internet Explorer
Disable changing ratings settings Enabled No \Windows Components\Internet Explorer
Turn off the auto-complete feature for web addresses Enabled No \Windows Components\Internet Explorer
Turn off suggestions for all user-installed providers Enabled No \Windows Components\Internet Explorer
Turn off the quick pick menu Enabled No \Windows Components\Internet Explorer
Search: Disable Find Files via F3 within the browser Enabled No \Windows Components\Internet Explorer
Search: Disable Search Customization Enabled No \Windows Components\Internet Explorer
Turn off ability to pin sites in Internet Explorer on the desktop Enabled No \Windows Components\Internet Explorer
Turn off the offer to update to the latest version of Windows Enabled No \Windows Components\Store
Turn off the Store application Enabled No \Windows Components\Store
Prohibit New Task Creation Enabled No \Windows Components\Task Scheduler

Set up a proxy to access only whitelisted websites

You can define a list of websites that a store worker (cashier) requires for normal operations, and set up an administrator-controlled proxy that has access only to these websites. Retail Cloud POS requires access to the following websites:

  • Retail Cloud POS website
  • Microsoft Azure Active Directory sign-in page
  • Retail Server website
  • Bing Maps resources
  • Media resources
  • Credit Card Payment acceptance page (optional)