Trusted Sites Zone Restricted Protocols
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Policy overview

Key metadata and intent for this policy.

Category
Windows Components > Internet Explorer > Security Features > Network Protocol Lockdown > Restricted Protocols Per Security Zone
Supported on
At least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1

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.

Internal name
IESF_NPLRest_TrustedSitesZone
Policy ID
7e5ae5a5556c
Elements
1

Registry values

How enabled and disabled states update the registry.

ScopeRegistry locationTypeEnabled valueDisabled valueCopy
Path
SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\RestrictedProtocols
Value name
ListBox_Support_2
REG_DWORD
HKLM
1
HKCU
1
HKLM
0
HKCU
0
Registry location
Type REG_DWORD · Both
Path
SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\RestrictedProtocols
Value name
ListBox_Support_2
Hive
HKLM
Enabled value
1
Disabled value
0
Hive
HKCU
Enabled value
1
Disabled value
0

Policy elements

Inputs and configuration options exposed by this policy.

ScopeElementTypeRegistry mappingConstraints & behaviorCopy
Enter restricted protocols for this zone.
ID IESF_NPLRestrictionsList
list
Path
SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\RestrictedProtocols\2
Value name
ListBox_Support_2
Type
REG_MULTI_SZ
List: additive
Enter restricted protocols for this zone.
Both · Type list
Registry mapping
Path
SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\RestrictedProtocols\2
Value name
ListBox_Support_2
Type
REG_MULTI_SZ
Details
List: additive