Policy overview

Key metadata and intent for this policy.

ClassUser
CategoryWindows Components > Internet Explorer > Security Features > Network Protocol Lockdown > Restricted Protocols Per Security Zone
Supported onAt 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_InternetZone
Policy ID
2b18ac87f1a8
Elements
1

Registry values

How enabled and disabled states update the registry.

Registry locationTypeEnabled valueDisabled value
HKCU\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\RestrictedProtocols\ListBox_Support_3REG_DWORD
1
0

Policy elements

Inputs and configuration options exposed by this policy.

ElementTypeRegistry mappingConstraints & behavior
Enter restricted protocols for this zone.
ID IESF_NPLRestrictionsList
list
HKCU\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\RestrictedProtocols\3\ListBox_Support_3
Type REG_MULTI_SZ
List: additive

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