Policy
Trusted Sites Zone Restricted Protocols
Windows 11 25H2
Policy overview
Key metadata and intent for this policy.
Supported OS tags: Windows10, Windows10RT, Windows11, Windows7, Windows8, Windows81, WindowsRT, WindowsRT81, WindowsServer2003, WindowsServer2008, WindowsServer2012, WindowsServer2012R2, WindowsServer2016, WindowsVista, WindowsXP
For each zone, the Network Protocol Lockdown security restriction may be configured to prevent active content obtained through restricted protocols from running in an unsafe manner, either by prompting the user, or simply disabling the content. For each zone, this list of protocols may be configured here, and applies to all processes which have opted in to the security restriction. If you enable this policy setting for a zone, this sets the list of protocols to be restricted if that zone is set to Prompt or Disable for "Allow active content over restricted protocols to access my computer." If you disable or do not configure this policy setting for a zone, no protocols are restricted for that zone, regardless of the setting for "Allow active content over restricted protocols to access my computer." Note. If policy for a zone is set in both Computer Configuration and User Configuration, both lists of protocols will be restricted for that zone.
Registry values
How enabled and disabled states update the registry.
| Registry location | Type | Enabled value | Disabled value |
|---|---|---|---|
| HKLM\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\RestrictedProtocols\ListBox_Support_2 | REG_DWORD | 1 | 0 |
Policy elements
Inputs and configuration options exposed by this policy.
| Element | Type | Registry mapping | Constraints & behavior |
|---|---|---|---|
Enter restricted protocols for this zone. ID IESF_NPLRestrictionsList | list | HKLM\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\RestrictedProtocols\2\ListBox_Support_2 Type REG_MULTI_SZ | List: additive |
Other policies in this category
Explore related policies at the same level.
- UserInternet Zone Restricted ProtocolsAt least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
- ComputerInternet Zone Restricted ProtocolsAt least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
- ComputerIntranet Zone Restricted ProtocolsAt least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
- UserIntranet Zone Restricted ProtocolsAt least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
- ComputerLocal Machine Zone Restricted ProtocolsAt least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
- UserLocal Machine Zone Restricted ProtocolsAt least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
- ComputerRestricted Sites Zone Restricted ProtocolsAt least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
- UserRestricted Sites Zone Restricted ProtocolsAt least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
- UserTrusted Sites Zone Restricted ProtocolsAt least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1