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windows/security/operating-system-security/network-security/windows-firewall/hyper-v-firewall.md
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--- ---
title: Hyper-V firewall title: Hyper-V firewall
description: Learn how description: Learn how to configure Hyper-V firewall rules and settings using PowerShell or Configuration Service Provider (CSP).
ms.topic: how-to ms.topic: how-to
ms.date: 11/08/2023 ms.date: 11/08/2023
appliesto:
- ✅ <a href="https://learn.microsoft.com/windows/release-health/supported-versions-windows-client" target="_blank">Windows 11</a>
--- ---
# Configure Hyper-V firewall rules # Configure Hyper-V firewall
Starting in Windows 11, version 22H2, Hyper-V firewall is a network firewall solution that enables filtering of inbound and outbound traffic to/from containers hosted by Windows, including the Windows Subsystem for Linux (WSL). Starting in Windows 11, version 22H2, Hyper-V firewall is a network firewall solution that enables filtering of inbound and outbound traffic to/from containers hosted by Windows, including the Windows Subsystem for Linux (WSL).\
This article describes how to configure Hyper-V firewall rules and settings using PowerShell, configuration service provider (CSP), or group policy (GPO).
## Configure with PowerShell ## Configure Hyper-V firewall with PowerShell
This section describes the steps to manage Hyper-V firewall using PowerShell. This section describes the steps to manage Hyper-V firewall using PowerShell.
### Obtain the VMCreatorId GUID ### Obtain the WSL GUID
Hyper-V firewall rules are enabled per *VMCreatorId*. To obtain the VMCreatorId, use the cmdlet: Hyper-V firewall rules are enabled per *VMCreatorId*. To obtain the VMCreatorId, use the cmdlet:
@ -21,7 +24,7 @@ Hyper-V firewall rules are enabled per *VMCreatorId*. To obtain the VMCreatorId,
Get-NetFirewallHyperVVMCreator Get-NetFirewallHyperVVMCreator
``` ```
The output contains a VmCreatorId object, which has *unique identifier* (GUID) and *friendly name* properties. For example, the following output shows WSL: The output contains a VmCreator object type, which has unique identifier `VMCreatorId` and `friendly name` properties. For example, the following output shows the properties of WSL:
```powershell ```powershell
PS C:\> Get-NetFirewallHyperVVMCreator PS C:\> Get-NetFirewallHyperVVMCreator
@ -29,6 +32,9 @@ VMCreatorId  : {40E0AC32-46A5-438A-A0B2-2B479E8F2E90}
FriendlyName : WSL FriendlyName : WSL
``` ```
> [!NOTE]
> The WSL VMCreatorId is `{40E0AC32-46A5-438A-A0B2-2B479E8F2E90}`.
### Verify Hyper-V firewall settings ### Verify Hyper-V firewall settings
Hyper-V firewall has settings that apply in general to a VMCreatorId. Use the [Get-NetFirewallHyperVVMSetting][PS-1] cmdlet to check the settings. For example, you can obtain the policies applied to WSL with the command: Hyper-V firewall has settings that apply in general to a VMCreatorId. Use the [Get-NetFirewallHyperVVMSetting][PS-1] cmdlet to check the settings. For example, you can obtain the policies applied to WSL with the command:
@ -103,29 +109,51 @@ The output contains an extra value compared to the ones described in the previou
> >
> To configure these **rules** per profile using the [Set-NetFirewallHyperVRule][PS-4] cmdlet with the `-Profile` option. > To configure these **rules** per profile using the [Set-NetFirewallHyperVRule][PS-4] cmdlet with the `-Profile` option.
## Configure with Configuration Service Provider (CSP) ## Configure Hyper-V firewall with CSP
You can configure Hyper-V firewall using the [Firewall CSP][CSP-1]. For example, with an MDM solution like Microsoft Intune. You can configure Hyper-V firewall using the [Firewall CSP][CSP-1]. For example, with an MDM solution like Microsoft Intune.
Here's a list of settings that can be used to configure Hyper-v firewall: Here's a list of settings that can be used to configure Hyper-v firewall:
| | Path | |Value name|Description|Values|
|--|--| |-|-|-|
| **CSP** | `./Vendor/MSFT/Firewall/MdmStore/HyperVVMSettings/{VMCreatorId}/`[AllowHostPolicyMerge] |EnableLoopback <br><br> `{40E0AC32-46A5-438A-A0B2-2B479E8F2E90}\HyperVVMSettings\EnableLoopback`|Enables loopback between this guest and another guest or the host.|[True,False]|
| **GPO** | Not available | |`./Vendor/MSFT/Firewall/MdmStore/HyperVVMSettings/{40E0AC32-46A5-438A-A0B2-2B479E8F2E90}/`[AllowHostPolicyMerge]|Enables Hyper-V firewall to use applicable host firewall settings and rules.|[True,False]|
| | Path | The following values apply to Hyper-V firewall profile settings: (Public, Private, Domain)
|--|--|
| **CSP** | `./Vendor/MSFT/Firewall/MdmStore/HyperVVMSettings/{VMCreatorId}/DomainProfile/`[AllowLocalPolicyMerge]
| **GPO** | Not available |
| | Path | |Value name|Description|Values|
|--|--| |---|---|---|
| **CSP** | `./Vendor/MSFT/Firewall/MdmStore/HyperVVMSettings/{VMCreatorId}/DomainProfile/`[EnableFirewall] |`./Vendor/MSFT/Firewall/MdmStore/HyperVVMSettings/{40E0AC32-46A5-438A-A0B2-2B479E8F2E90}/DomainProfile/`[EnableFirewall]|Enables Hyper-V firewall rules for this profile.|[True, False]|
| **GPO** | Not available | |DefaultOutboundAction <br><br> `{40E0AC32-46A5-438A-A0B2-2B479E8F2E90}\HyperVVMSettings\<Profile>\DefaultOutboundAction`|The default action for outbound traffic that is applied if no rules match the traffic.|0 (allow) <br><br>1 (block)|
|DefaultInboundAction <br><br> `{40E0AC32-46A5-438A-A0B2-2B479E8F2E90}\HyperVVMSettings\<Profile>\DefaultInboundAction`|The default action for inbound traffic that is applied if no rules match the traffic.|0 (allow) <br><br>1 (block)|
|`./Vendor/MSFT/Firewall/MdmStore/HyperVVMSettings/{40E0AC32-46A5-438A-A0B2-2B479E8F2E90}/DomainProfile/`[AllowLocalPolicyMerge]|||
<!-- links --> The following values apply to Hyper-V firewall rules:
|Value name|Description|Values|
|---|---|---|
|Name <br><br>`HyperVFirewallRules\<RuleId>\Name`|Friendly name of the rule|String|
|Priority <br><br>`HyperVFirewallRules\<RuleId>\Priority`|Specifies the ordering of rule enforcement. If not specified, block rules are ordered ahead of allow rules. A lower priority rule is evaluated before a higher priority one.|int|
|Direction <br><br>`HyperVFirewallRules\<RuleId>\Direction`|Comma separated list.  The rule is enabled based on the traffic direction as following. <br><br>IN - the rule applies to inbound traffic. <br><br>OUT - the rule applies to outbound traffic. <br><br>If not specified the detault is OUT.|String|
|VMCreatorId <br><br>`HyperVFirewallRules\<RuleId>\VMCreatorId`|This field specifies the VM Creator ID that this rule is applicable to. A NULL GUID will result in this rule applying to all VM creators. <br><br>Can be filled in automatically from earlier profile?|String (GUID)|
|Protocol <br><br>`HyperVFirewallRules\<RuleId>\Protocol`|0-255 number representing the ip protocol (TCP = 6, UDP = 17).  If not specified the default is All.|Int|
|LocalAddressRanges <br><br>`HyperVFirewallRules\<RuleId>\LocalAddressRanges`|Consists of one or more comma-delimited tokens specifying the local addresses covered by the rule. "*" is the default value. <br><br>Valid tokens include: <br><br>"*" indicates any local address. If present, this must be the only token included. <br><br>A subnet can be specified using either the subnet mask or network prefix notation. If neither a subnet mask not a network prefix is specified, the subnet mask defaults to 255.255.255.255. <br><br>A valid IPv6 address. <br><br>An IPv4 address range in the format of "start address - end address" with no spaces included. <br><br>An IPv6 address range in the format of "start address - end address" with no spaces included.  If not specified the default is All.|String|
|LocalPortRanges <br><br>`HyperVFirewallRules\<RuleId>\LocalPortRanges`|Comma Separated list of ranges specifying the local port of the traffic covered by this rule. For example, 100-120,200,300-320.  If not specified the default is All.|String|
|RemoteAddressRanges <br><br>`HyperVFirewallRules\<RuleId>\RemoteAddressRanges`|Consists of one or more comma-delimited tokens specifying the remote addresses covered by the rule. "*" is the default value. <br><br>Valid tokens include: <br><br>"*" indicates any remote address. If present, this must be the only token included. <br><br>A subnet can be specified using either the subnet mask or network prefix notation. If neither a subnet mask not a network prefix is specified, the subnet mask defaults to 255.255.255.255. <br><br>A valid IPv6 address. <br><br>An IPv4 address range in the format of "start address - end address" with no spaces included. <br><br>An IPv6 address range in the format of "start address - end address" with no spaces included.  If not specified the default is All.|String|
|RemotePortRanges <br><br>`HyperVFirewallRules\<RuleId>\RemotePortRanges`|Comma Separated list of ranges specifying the remote port of the traffic covered by this rule. For example, 100-120,200,300-320.  If not specified the default is All.|String|
|Action <br><br>`HyperVFirewallRules\<RuleId>\Action`|Specifies the action the rule enforces: <br><br>0 - Block <br><br>1 - Allow|Int|
|Enabled <br><br>`HyperVFirewallRules\<RuleId>\Enabled`|Indicates whether the rule is enabled or disabled. If the rule must be enabled, this value must be set to true. If not specified - a new rule is disabled by default.|Boolean|
|Status <br><br>`HyperVFirewallRules\<RuleId>\Status`|Provides information about the specific version of the rule in deployment for monitoring purposes.|String|
|Profiles <br><br>`HyperVFirewallRules\<RuleId>\Profiles`|Specifies the profiles to which the rule belongs: Domain, Private, Public. See [FW_PROFILE_TYPE](/openspecs/windows_protocols/ms-fasp/7704e238-174d-4a5e-b809-5f3787dd8acc) for the bitmasks that are used to identify profile types. If not specified, the default is All.|Int|
### :::image type="icon" source="../../../images/icons/feedback.svg" border="false"::: Provide feedback
To provide feedback for Hyper-V firewall, open [**Feedback Hub**][FHUB] and use the category **Security and Privacy > Microsoft Defender Firewall and network protection**.
<!--links used in this document-->
[CSP-1]: /windows/client-management/mdm/policy-csp-authentication#enablepasswordlessexperience
[PS-1]: /powershell/module/netsecurity/get-netfirewallhypervvmsetting [PS-1]: /powershell/module/netsecurity/get-netfirewallhypervvmsetting
[PS-2]: /powershell/module/netsecurity/set-netfirewallhypervvmsetting [PS-2]: /powershell/module/netsecurity/set-netfirewallhypervvmsetting
[PS-3]: /powershell/module/netsecurity/get-netfirewallhypervrule [PS-3]: /powershell/module/netsecurity/get-netfirewallhypervrule