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Microsoft Windows Firewall with Advanced Security Security Technical Implementation Guide

  • Version/Release: V2R1
  • Published: 2021-10-15
  • Released: 2021-11-01
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This Security Technical Implementation Guide is published as a tool to improve the security of Department of Defense (DoD) information systems. The requirements are derived from the National Institute of Standards and Technology (NIST) 800-53 and related documents. Comments or proposed revisions to this document should be sent via email to the following address: disa.stig_spt@mail.mil.
b
The Windows Firewall with Advanced Security must be enabled when connected to a domain.
AC-4 - Medium - CCI-001414 - V-241989 - SV-241989r698208_rule
RMF Control
AC-4
Severity
Medium
CCI
CCI-001414
Version
WNFWA-000001
Vuln IDs
  • V-241989
  • V-17415
Rule IDs
  • SV-241989r698208_rule
  • SV-54833
A firewall provides a line of defense against attack. To be effective, it must be enabled and properly configured. This setting enables the firewall when connected to the domain.
Checks: C-45264r698206_chk

If the system is not a member of a domain, the Domain Profile requirements can be marked NA. If the following policy-based registry value exists and is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\ Value Name: EnableFirewall Type: REG_DWORD Value: 0x00000001 (1) If the policy-based registry value does not exist, verify the following registry value. If it is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\ Value Name: EnableFirewall Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-45223r698207_fix

The preferred method of configuring the firewall settings is with a policy, particularly in a domain environment. Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Windows Firewall with Advanced Security -> Windows Firewall with Advanced Security -> Windows Firewall Properties (this link will be in the right pane) -> Domain Profile Tab -> State, "Firewall state" to "On (recommended)". In addition to using policies, systems may also be configured using the firewall GUI or Netsh commands. These methods may be more appropriate for standalone systems. The configuration settings in the GUI are the same as those specified in the policy above. Windows Firewall Properties will be a link in the center pane after opening Windows Firewall with Advanced Security. The following Netsh commands may also be used to configure this setting: "Netsh advfirewall set domainprofile state on". Or "Netsh advfirewall set allprofiles state on".

b
The Windows Firewall with Advanced Security must be enabled when connected to a private network.
AC-4 - Medium - CCI-001414 - V-241990 - SV-241990r698211_rule
RMF Control
AC-4
Severity
Medium
CCI
CCI-001414
Version
WNFWA-000002
Vuln IDs
  • V-241990
  • V-17416
Rule IDs
  • SV-241990r698211_rule
  • SV-54849
A firewall provides a line of defense against attack. To be effective, it must be enabled and properly configured. This setting enables the firewall when connected to a private network.
Checks: C-45265r698209_chk

If the following policy-based registry value exists and is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\WindowsFirewall\PrivateProfile\ Value Name: EnableFirewall Type: REG_DWORD Value: 0x00000001 (1) If the policy-based registry value does not exist, verify the following registry value. If it is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\ Value Name: EnableFirewall Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-45224r698210_fix

The preferred method of configuring the firewall settings is with a policy, particularly in a domain environment. Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Windows Firewall with Advanced Security -> Windows Firewall with Advanced Security -> Windows Firewall Properties (this link will be in the right pane) -> Private Profile Tab -> State, "Firewall state" to "On (recommended)". In addition to using policies, systems may also be configured using the firewall GUI or Netsh commands. These methods may be more appropriate for standalone systems. The configuration settings in the GUI are the same as those specified in the policy above. Windows Firewall Properties will be a link in the center pane after opening Windows Firewall with Advanced Security. The following Netsh commands may also be used to configure this setting: "Netsh advfirewall set privateprofile state on". Or "Netsh advfirewall set allprofiles state on".

b
The Windows Firewall with Advanced Security must be enabled when connected to a public network.
AC-4 - Medium - CCI-001414 - V-241991 - SV-241991r698214_rule
RMF Control
AC-4
Severity
Medium
CCI
CCI-001414
Version
WNFWA-000003
Vuln IDs
  • V-241991
  • V-17417
Rule IDs
  • SV-241991r698214_rule
  • SV-54855
A firewall provides a line of defense against attack. To be effective, it must be enabled and properly configured. This setting enables the firewall when connected to a public network.
Checks: C-45266r698212_chk

If the following policy-based registry value exists and is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\WindowsFirewall\PublicProfile\ Value Name: EnableFirewall Type: REG_DWORD Value: 0x00000001 (1) If the policy-based registry value does not exist, verify the following registry value. If it is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\PublicProfile\ Value Name: EnableFirewall Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-45225r698213_fix

The preferred method of configuring the firewall settings is with a policy, particularly in a domain environment. Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Windows Firewall with Advanced Security -> Windows Firewall with Advanced Security -> Windows Firewall Properties (this link will be in the right pane) -> Public Profile Tab -> State, "Firewall state" to "On (recommended)". In addition to using policies, systems may also be configured using the firewall GUI or Netsh commands. These methods may be more appropriate for standalone systems. The configuration settings in the GUI are the same as those specified in the policy above. Windows Firewall Properties will be a link in the center pane after opening Windows Firewall with Advanced Security. The following Netsh commands may also be used to configure this setting: "Netsh advfirewall set publicprofile state on". Or "Netsh advfirewall set allprofiles state on".

c
The Windows Firewall with Advanced Security must block unsolicited inbound connections when connected to a domain.
CM-7 - High - CCI-000382 - V-241992 - SV-241992r698217_rule
RMF Control
CM-7
Severity
High
CCI
CCI-000382
Version
WNFWA-000004
Vuln IDs
  • V-241992
  • V-17418
Rule IDs
  • SV-241992r698217_rule
  • SV-54859
A firewall provides a line of defense against attack. To be effective, it must be enabled and properly configured. Unsolicited inbound connections may be malicious attempts to gain access to a system. Unsolicited inbound connections, for which there is no rule allowing the connection, will be blocked in the domain.
Checks: C-45267r698215_chk

If the system is not a member of a domain, the Domain Profile requirements can be marked NA. If the system is a member of a domain and the firewall's Domain Profile is not enabled (see V-17415), this requirement is also a finding. If the following policy-based registry value exists and is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\ Value Name: DefaultInboundAction Type: REG_DWORD Value: 0x00000001 (1) If the policy-based registry value does not exist, verify the following registry value. If it is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\ Value Name: DefaultInboundAction Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-45226r698216_fix

The preferred method of configuring the firewall settings is with a policy, particularly in a domain environment. Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Windows Firewall with Advanced Security -> Windows Firewall with Advanced Security -> Windows Firewall Properties (this link will be in the right pane) -> Domain Profile Tab -> State, "Inbound connections" to "Block (default)". In addition to using policies, systems may also be configured using the firewall GUI or Netsh commands. These methods may be more appropriate for standalone systems. The configuration settings in the GUI are the same as those specified in the policy above. Windows Firewall Properties will be a link in the center pane after opening Windows Firewall with Advanced Security. The following Netsh commands may also be used to configure this setting: "Netsh advfirewall set domainprofile firewallpolicy blockinbound,allowoutbound". Or "Netsh advfirewall set allprofiles firewallpolicy blockinbound,allowoutbound". Both inbound and outbound parameters must be specified to execute this command.

b
The Windows Firewall with Advanced Security must allow outbound connections, unless a rule explicitly blocks the connection when connected to a domain.
SC-5 - Medium - CCI-001094 - V-241993 - SV-241993r698220_rule
RMF Control
SC-5
Severity
Medium
CCI
CCI-001094
Version
WNFWA-000005
Vuln IDs
  • V-241993
  • V-17419
Rule IDs
  • SV-241993r698220_rule
  • SV-54863
A firewall provides a line of defense against attack. To be effective, it must be enabled and properly configured. Outbound connections are allowed in the domain, unless a rule explicitly blocks the connection. This allows normal outbound communication, which could be restricted as necessary with additional rules.
Checks: C-45268r698218_chk

If the system is not a member of a domain, the Domain Profile requirements can be marked NA. If the system is a member of a domain and the firewall's Domain Profile is not enabled (see V-17415), this requirement is also a finding. If the following policy-based registry value exists and is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\ Value Name: DefaultOutboundAction Type: REG_DWORD Value: 0x00000000 (0) If the policy-based registry value does not exist, verify the following registry value. If it is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\ Value Name: DefaultOutboundAction Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-45227r698219_fix

The preferred method of configuring the firewall settings is with a policy, particularly in a domain environment. Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Windows Firewall with Advanced Security -> Windows Firewall with Advanced Security -> Windows Firewall Properties (this link will be in the right pane) -> Domain Profile Tab -> State, "Outbound connections" to "Allow (default)". In addition to using policies, systems may also be configured using the firewall GUI or Netsh commands. These methods may be more appropriate for standalone systems. The configuration settings in the GUI are the same as those specified in the policy above. Windows Firewall Properties will be a link in the center pane after opening Windows Firewall with Advanced Security. The following Netsh commands may also be used to configure this setting: "Netsh advfirewall set domainprofile firewallpolicy blockinbound,allowoutbound". Or "Netsh advfirewall set allprofiles firewallpolicy blockinbound,allowoutbound". Both inbound and outbound parameters must be specified to execute this command.

a
The Windows Firewall with Advanced Security log size must be configured for domain connections.
AU-5 - Low - CCI-000140 - V-241994 - SV-241994r698223_rule
RMF Control
AU-5
Severity
Low
CCI
CCI-000140
Version
WNFWA-000009
Vuln IDs
  • V-241994
  • V-17425
Rule IDs
  • SV-241994r698223_rule
  • SV-54874
A firewall provides a line of defense against attack. To be effective, it must be enabled and properly configured. The firewall log file size for a domain connection will be set to ensure enough capacity is allocated for audit data.
Checks: C-45269r698221_chk

If the system is not a member of a domain, the Domain Profile requirements can be marked NA. If the system is a member of a domain and the firewall's Domain Profile is not enabled (see V-17415), this requirement is also a finding. If the following policy-based registry value exists and is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\Logging\ Value Name: LogFileSize Type: REG_DWORD Value: 0x00004000 (16384) (or greater) If the policy-based registry value does not exist, verify the following registry value. If it is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\Logging\ Value Name: LogFileSize Type: REG_DWORD Value: 0x00004000 (16384) (or greater)

Fix: F-45228r698222_fix

The preferred method of configuring the firewall settings is with a policy, particularly in a domain environment. Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Windows Firewall with Advanced Security -> Windows Firewall with Advanced Security -> Windows Firewall Properties (this link will be in the right pane) -> Domain Profile Tab -> Logging (select Customize), "Size limit (KB):" to "16,384" or greater. In addition to using policies, systems may also be configured using the firewall GUI or Netsh commands. These methods may be more appropriate for standalone systems. The configuration settings in the GUI are the same as those specified in the policy above. Windows Firewall Properties will be a link in the center pane after opening Windows Firewall with Advanced Security. The following Netsh command may also be used to configure this setting: "Netsh advfirewall set domainprofile logging maxfilesize 16384" or greater.

a
The Windows Firewall with Advanced Security must log dropped packets when connected to a domain.
AU-12 - Low - CCI-000172 - V-241995 - SV-241995r698226_rule
RMF Control
AU-12
Severity
Low
CCI
CCI-000172
Version
WNFWA-000010
Vuln IDs
  • V-241995
  • V-17426
Rule IDs
  • SV-241995r698226_rule
  • SV-54877
A firewall provides a line of defense against attack. To be effective, it must be enabled and properly configured. Logging of dropped packets for a domain connection will be enabled to maintain an audit trail of potential issues.
Checks: C-45270r698224_chk

If the system is not a member of a domain, the Domain Profile requirements can be marked NA. If the system is a member of a domain and the firewall's Domain Profile is not enabled (see V-17415), this requirement is also a finding. If the following policy-based registry value exists and is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\Logging\ Value Name: LogDroppedPackets Type: REG_DWORD Value: 0x00000001 (1) If the policy-based registry value does not exist, verify the following registry value. If it is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\Logging\ Value Name: LogDroppedPackets Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-45229r698225_fix

The preferred method of configuring the firewall settings is with a policy, particularly in a domain environment. Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Windows Firewall with Advanced Security -> Windows Firewall with Advanced Security -> Windows Firewall Properties (this link will be in the right pane) -> Domain Profile Tab -> Logging (select Customize), "Log dropped packets" to "Yes". In addition to using policies, systems may also be configured using the firewall GUI or Netsh commands. These methods may be more appropriate for standalone systems. The configuration settings in the GUI are the same as those specified in the policy above. Windows Firewall Properties will be a link in the center pane after opening Windows Firewall with Advanced Security. The following Netsh commands may also be used to configure this setting: "Netsh advfirewall set domainprofile logging droppedconnections enable". Or "Netsh advfirewall set allprofiles logging droppedconnections enable".

a
The Windows Firewall with Advanced Security must log successful connections when connected to a domain.
AU-14 - Low - CCI-001462 - V-241996 - SV-241996r698229_rule
RMF Control
AU-14
Severity
Low
CCI
CCI-001462
Version
WNFWA-000011
Vuln IDs
  • V-241996
  • V-17427
Rule IDs
  • SV-241996r698229_rule
  • SV-54878
A firewall provides a line of defense against attack. To be effective, it must be enabled and properly configured. Logging of successful connections for a domain connection will be enabled to maintain an audit trail if issues are discovered.
Checks: C-45271r698227_chk

If the system is not a member of a domain, the Domain Profile requirements can be marked NA. If the system is a member of a domain and the firewall's Domain Profile is not enabled (see V-17415), this requirement is also a finding. If the following policy-based registry value exists and is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\Logging\ Value Name: LogSuccessfulConnections Type: REG_DWORD Value: 0x00000001 (1) If the policy-based registry value does not exist, verify the following registry value. If it is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\Logging\ Value Name: LogSuccessfulConnections Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-45230r698228_fix

The preferred method of configuring the firewall settings is with a policy, particularly in a domain environment. Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Windows Firewall with Advanced Security -> Windows Firewall with Advanced Security -> Windows Firewall Properties (this link will be in the right pane) -> Domain Profile Tab -> Logging (select Customize), "Log successful connections" to "Yes". In addition to using policies, systems may also be configured using the firewall GUI or Netsh commands. These methods may be more appropriate for standalone systems. The configuration settings in the GUI are the same as those specified in the policy above. Windows Firewall Properties will be a link in the center pane after opening Windows Firewall with Advanced Security. The following Netsh commands may also be used to configure this setting: "Netsh advfirewall set domainprofile logging allowedconnections enable". Or "Netsh advfirewall set allprofiles logging allowedconnections enable".

c
The Windows Firewall with Advanced Security must block unsolicited inbound connections when connected to a private network.
CM-7 - High - CCI-000382 - V-241997 - SV-241997r698232_rule
RMF Control
CM-7
Severity
High
CCI
CCI-000382
Version
WNFWA-000012
Vuln IDs
  • V-241997
  • V-17428
Rule IDs
  • SV-241997r698232_rule
  • SV-54879
A firewall provides a line of defense against attack. To be effective, it must be enabled and properly configured. Unsolicited inbound connections may be malicious attempts to gain access to a system. Unsolicited inbound connections, for which there is no rule allowing the connection, will be blocked on a private network.
Checks: C-45272r698230_chk

If the firewall's Private Profile is not enabled (see V-17416), this requirement is also a finding. If the following policy-based registry value exists and is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\WindowsFirewall\PrivateProfile\ Value Name: DefaultInboundAction Type: REG_DWORD Value: 0x00000001 (1) If the policy-based registry value does not exist, verify the following registry value. If it is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\ Value Name: DefaultInboundAction Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-45231r698231_fix

The preferred method of configuring the firewall settings is with a policy, particularly in a domain environment. Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Windows Firewall with Advanced Security -> Windows Firewall with Advanced Security -> Windows Firewall Properties (this link will be in the right pane) -> Private Profile Tab -> State, "Inbound connections" to "Block (default)". In addition to using policies, systems may also be configured using the firewall GUI or Netsh commands. These methods may be more appropriate for standalone systems. The configuration settings in the GUI are the same as those specified in the policy above. Windows Firewall Properties will be a link in the center pane after opening Windows Firewall with Advanced Security. The following Netsh commands may also be used to configure this setting: "Netsh advfirewall set privateprofile firewallpolicy blockinbound,allowoutbound". Or "Netsh advfirewall set allprofiles firewallpolicy blockinbound,allowoutbound". Both inbound and outbound parameters must be specified to execute this command.

b
The Windows Firewall with Advanced Security must allow outbound connections, unless a rule explicitly blocks the connection when connected to a private network.
SC-5 - Medium - CCI-001094 - V-241998 - SV-241998r698235_rule
RMF Control
SC-5
Severity
Medium
CCI
CCI-001094
Version
WNFWA-000013
Vuln IDs
  • V-241998
  • V-17429
Rule IDs
  • SV-241998r698235_rule
  • SV-54890
A firewall provides a line of defense against attack. To be effective, it must be enabled and properly configured. Outbound connections are allowed on a private network, unless a rule explicitly blocks the connection. This allows normal outbound communication, which could be restricted as necessary with additional rules.
Checks: C-45273r698233_chk

If the firewall's Private Profile is not enabled (see V-17416), this requirement is also a finding. If the following policy-based registry value exists and is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\WindowsFirewall\PrivateProfile\ Value Name: DefaultOutboundAction Type: REG_DWORD Value: 0x00000000 (0) If the policy-based registry value does not exist, verify the following registry value. If it is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\ Value Name: DefaultOutboundAction Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-45232r698234_fix

The preferred method of configuring the firewall settings is with a policy, particularly in a domain environment. Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Windows Firewall with Advanced Security -> Windows Firewall with Advanced Security -> Windows Firewall Properties (this link will be in the right pane) -> Private Profile Tab -> State, "Outbound connections" to "Allow (default)". In addition to using policies, systems may also be configured using the firewall GUI or Netsh commands. These methods may be more appropriate for standalone systems. The configuration settings in the GUI are the same as those specified in the policy above. Windows Firewall Properties will be a link in the center pane after opening Windows Firewall with Advanced Security. The following Netsh commands may also be used to configure this setting: "Netsh advfirewall set privateprofile firewallpolicy blockinbound,allowoutbound". Or "Netsh advfirewall set allprofiles firewallpolicy blockinbound,allowoutbound". Both inbound and outbound parameters must be specified to execute this command.

a
The Windows Firewall with Advanced Security log size must be configured for private network connections.
AU-5 - Low - CCI-000140 - V-241999 - SV-241999r698238_rule
RMF Control
AU-5
Severity
Low
CCI
CCI-000140
Version
WNFWA-000017
Vuln IDs
  • V-241999
  • V-17435
Rule IDs
  • SV-241999r698238_rule
  • SV-54903
A firewall provides a line of defense against attack. To be effective, it must be enabled and properly configured. The firewall log file size for a private connection will be set to ensure enough capacity is allocated for audit data.
Checks: C-45274r698236_chk

If the firewall's Private Profile is not enabled (see V-17416), this requirement is also a finding. If the following policy-based registry value exists and is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\WindowsFirewall\PrivateProfile\Logging\ Value Name: LogFileSize Type: REG_DWORD Value: 0x00004000 (16384) (or greater) If the policy-based registry value does not exist, verify the following registry value. If it is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\Logging\ Value Name: LogFileSize Type: REG_DWORD Value: 0x00004000 (16384) (or greater)

Fix: F-45233r698237_fix

The preferred method of configuring the firewall settings is with a policy, particularly in a domain environment. Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Windows Firewall with Advanced Security -> Windows Firewall with Advanced Security -> Windows Firewall Properties (this link will be in the right pane) -> Private Profile Tab -> Logging (select Customize), "Size limit (KB)" to "16,384" or greater. In addition to using policies, systems may also be configured using the firewall GUI or Netsh commands. These methods may be more appropriate for standalone systems. The configuration settings in the GUI are the same as those specified in the policy above. Windows Firewall Properties will be a link in the center pane after opening Windows Firewall with Advanced Security. The following Netsh command may also be used to configure this setting: "Netsh advfirewall set privateprofile logging maxfilesize 16384" or greater.

a
The Windows Firewall with Advanced Security must log dropped packets when connected to a private network.
AU-12 - Low - CCI-000172 - V-242000 - SV-242000r698241_rule
RMF Control
AU-12
Severity
Low
CCI
CCI-000172
Version
WNFWA-000018
Vuln IDs
  • V-242000
  • V-17436
Rule IDs
  • SV-242000r698241_rule
  • SV-54904
A firewall provides a line of defense against attack. To be effective, it must be enabled and properly configured. Logging of dropped packets for a private network connection will be enabled to maintain an audit trail of potential issues.
Checks: C-45275r698239_chk

If the firewall's Private Profile is not enabled (see V-17416), this requirement is also a finding. If the following policy-based registry value exists and is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\WindowsFirewall\PrivateProfile\Logging\ Value Name: LogDroppedPackets Type: REG_DWORD Value: 0x00000001 (1) If the policy-based registry value does not exist, verify the following registry value. If it is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\Logging\ Value Name: LogDroppedPackets Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-45234r698240_fix

The preferred method of configuring the firewall settings is with a policy, particularly in a domain environment. Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Windows Firewall with Advanced Security -> Windows Firewall with Advanced Security -> Windows Firewall Properties (this link will be in the right pane) -> Private Profile Tab -> Logging (select Customize), "Log dropped packets" to "Yes". In addition to using policies, systems may also be configured using the firewall GUI or Netsh commands. These methods may be more appropriate for standalone systems. The configuration settings in the GUI are the same as those specified in the policy above. Windows Firewall Properties will be a link in the center pane after opening Windows Firewall with Advanced Security. The following Netsh commands may also be used to configure this setting: "Netsh advfirewall set privateprofile logging droppedconnections enable". Or "Netsh advfirewall set allprofiles logging droppedconnections enable".

a
The Windows Firewall with Advanced Security must log successful connections when connected to a private network.
AU-14 - Low - CCI-001462 - V-242001 - SV-242001r698244_rule
RMF Control
AU-14
Severity
Low
CCI
CCI-001462
Version
WNFWA-000019
Vuln IDs
  • V-242001
  • V-17437
Rule IDs
  • SV-242001r698244_rule
  • SV-54905
A firewall provides a line of defense against attack. To be effective, it must be enabled and properly configured. Logging of successful connections for a private network connection will be enabled to maintain an audit trail if issues are discovered.
Checks: C-45276r698242_chk

If the firewall's Private Profile is not enabled (see V-17416), this requirement is also a finding. If the following policy-based registry value exists and is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\WindowsFirewall\PrivateProfile\Logging\ Value Name: LogSuccessfulConnections Type: REG_DWORD Value: 0x00000001 (1) If the policy-based registry value does not exist, verify the following registry value. If it is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\Logging\ Value Name: LogSuccessfulConnections Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-45235r698243_fix

The preferred method of configuring the firewall settings is with a policy, particularly in a domain environment. Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Windows Firewall with Advanced Security -> Windows Firewall with Advanced Security -> Windows Firewall Properties (this link will be in the right pane) -> Private Profile Tab -> Logging (select Customize), "Logged successful connections" to "Yes". In addition to using policies, systems may also be configured using the firewall GUI or Netsh commands. These methods may be more appropriate for standalone systems. The configuration settings in the GUI are the same as those specified in the policy above. Windows Firewall Properties will be a link in the center pane after opening Windows Firewall with Advanced Security. The following Netsh commands may also be used to configure this setting: "Netsh advfirewall set privateprofile logging allowedconnections enable". Or "Netsh advfirewall set allprofiles logging allowedconnections enable".

c
The Windows Firewall with Advanced Security must block unsolicited inbound connections when connected to a public network.
CM-7 - High - CCI-000382 - V-242002 - SV-242002r698247_rule
RMF Control
CM-7
Severity
High
CCI
CCI-000382
Version
WNFWA-000020
Vuln IDs
  • V-242002
  • V-17438
Rule IDs
  • SV-242002r698247_rule
  • SV-54906
A firewall provides a line of defense against attack. To be effective, it must be enabled and properly configured. Unsolicited inbound connections may be malicious attempts to gain access to a system. Unsolicited inbound connections, for which there is no rule allowing the connection, will be blocked on a public network.
Checks: C-45277r698245_chk

If the firewall's Public Profile is not enabled (see V-17417), this requirement is also a finding. If the following policy-based registry value exists and is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\WindowsFirewall\PublicProfile\ Value Name: DefaultInboundAction Type: REG_DWORD Value: 0x00000001 (1) If the policy-based registry value does not exist, verify the following registry value. If it is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\PublicProfile\ Value Name: DefaultInboundAction Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-45236r698246_fix

The preferred method of configuring the firewall settings is with a policy, particularly in a domain environment. Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Windows Firewall with Advanced Security -> Windows Firewall with Advanced Security -> Windows Firewall Properties (this link will be in the right pane) -> Public Profile Tab -> State, "Inbound connections" to "Block (default)". In addition to using policies, systems may also be configured using the firewall GUI or Netsh commands. These methods may be more appropriate for standalone systems. The configuration settings in the GUI are the same as those specified in the policy above. Windows Firewall Properties will be a link in the center pane after opening Windows Firewall with Advanced Security. The following Netsh commands may also be used to configure this setting: "Netsh advfirewall set publicprofile firewallpolicy blockinbound,allowoutbound". Or "Netsh advfirewall set allprofiles firewallpolicy blockinbound,allowoutbound". Both inbound and outbound parameters must be specified to execute this command.

b
The Windows Firewall with Advanced Security must allow outbound connections, unless a rule explicitly blocks the connection when connected to a public network.
SC-5 - Medium - CCI-001094 - V-242003 - SV-242003r698250_rule
RMF Control
SC-5
Severity
Medium
CCI
CCI-001094
Version
WNFWA-000021
Vuln IDs
  • V-242003
  • V-17439
Rule IDs
  • SV-242003r698250_rule
  • SV-54908
A firewall provides a line of defense against attack. To be effective, it must be enabled and properly configured. Outbound connections are allowed on a public network, unless a rule explicitly blocks the connection. This allows normal outbound communication, which could be restricted as necessary with additional rules.
Checks: C-45278r698248_chk

If the firewall's Public Profile is not enabled (see V-17417), this requirement is also a finding. If the following policy-based registry value exists and is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\WindowsFirewall\PublicProfile\ Value Name: DefaultOutboundAction Type: REG_DWORD Value: 0x00000000 (0) If the policy-based registry value does not exist, verify the following registry value. If it is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\PublicProfile\ Value Name: DefaultOutboundAction Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-45237r698249_fix

The preferred method of configuring the firewall settings is with a policy, particularly in a domain environment. Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Windows Firewall with Advanced Security -> Windows Firewall with Advanced Security -> Windows Firewall Properties (this link will be in the right pane) -> Public Profile Tab -> State, "Outbound connections" to "Allow (default)". In addition to using policies, systems may also be configured using the firewall GUI or Netsh commands. These methods may be more appropriate for standalone systems. The configuration settings in the GUI are the same as those specified in the policy above. Windows Firewall Properties will be a link in the center pane after opening Windows Firewall with Advanced Security. The following Netsh commands may also be used to configure this setting: "Netsh advfirewall set publicprofile firewallpolicy blockinbound,allowoutbound". Or "Netsh advfirewall set allprofiles firewallpolicy blockinbound,allowoutbound". Both inbound and outbound parameters must be specified to execute this command.

b
The Windows Firewall with Advanced Security local firewall rules must not be merged with Group Policy settings when connected to a public network.
SC-24 - Medium - CCI-001190 - V-242004 - SV-242004r698253_rule
RMF Control
SC-24
Severity
Medium
CCI
CCI-001190
Version
WNFWA-000024
Vuln IDs
  • V-242004
  • V-17442
Rule IDs
  • SV-242004r698253_rule
  • SV-54917
A firewall provides a line of defense against attack. To be effective, it must be enabled and properly configured. Local firewall rules will not be merged with Group Policy settings on a public network to prevent Group Policy settings from being changed.
Checks: C-45279r698251_chk

If the system is not a member of a domain, this is NA. If the firewall's Public Profile is not enabled (see V-17417), this requirement is also a finding. Verify the registry value below. If this registry value does not exist or is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\WindowsFirewall\PublicProfile\ Value Name: AllowLocalPolicyMerge Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-45238r698252_fix

If the system is not a member of a domain, this is NA. Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Windows Firewall with Advanced Security -> Windows Firewall with Advanced Security -> Windows Firewall Properties (this link will be in the right pane) -> Public Profile Tab -> Settings (select Customize) -> Rule merging, "Apply local firewall rules:" to "No".

b
The Windows Firewall with Advanced Security local connection rules must not be merged with Group Policy settings when connected to a public network.
SC-24 - Medium - CCI-001190 - V-242005 - SV-242005r698256_rule
RMF Control
SC-24
Severity
Medium
CCI
CCI-001190
Version
WNFWA-000025
Vuln IDs
  • V-242005
  • V-17443
Rule IDs
  • SV-242005r698256_rule
  • SV-54918
A firewall provides a line of defense against attack. To be effective, it must be enabled and properly configured. Local connection rules will not be merged with Group Policy settings on a public network to prevent Group Policy settings from being changed.
Checks: C-45280r698254_chk

If the system is not a member of a domain, this is NA. If the firewall's Public Profile is not enabled (see V-17417), this requirement is also a finding. Verify the registry value below. If this registry value does not exist or is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\WindowsFirewall\PublicProfile\ Value Name: AllowLocalIPsecPolicyMerge Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-45239r698255_fix

If the system is not a member of a domain, this is NA. Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Windows Firewall with Advanced Security -> Windows Firewall with Advanced Security -> Windows Firewall Properties (this link will be in the right pane) -> Public Profile Tab -> Settings (select Customize) -> Rule merging, "Apply local connection security rules:" to "No".

a
The Windows Firewall with Advanced Security log size must be configured for public network connections.
AU-5 - Low - CCI-000140 - V-242006 - SV-242006r698259_rule
RMF Control
AU-5
Severity
Low
CCI
CCI-000140
Version
WNFWA-000027
Vuln IDs
  • V-242006
  • V-17445
Rule IDs
  • SV-242006r698259_rule
  • SV-54921
A firewall provides a line of defense against attack. To be effective, it must be enabled and properly configured. The firewall log file size for a public network connection will be set to ensure enough capacity is allocated for audit data.
Checks: C-45281r698257_chk

If the firewall's Public Profile is not enabled (see V-17417), this requirement is also a finding. If the following policy-based registry value exists and is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\WindowsFirewall\PublicProfile\Logging\ Value Name: LogFileSize Type: REG_DWORD Value: 0x00004000 (16384) (or greater) If the policy-based registry value does not exist, verify the following registry value. If it is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\PublicProfile\Logging\ Value Name: LogFileSize Type: REG_DWORD Value: 0x00004000 (16384) (or greater)

Fix: F-45240r698258_fix

The preferred method of configuring the firewall settings is with a policy, particularly in a domain environment. Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Windows Firewall with Advanced Security -> Windows Firewall with Advanced Security -> Windows Firewall Properties (this link will be in the right pane) -> Public Profile Tab -> Logging (select Customize), "Size limit (KB)" to "16,384" or greater. In addition to using policies, systems may also be configured using the firewall GUI or Netsh commands. These methods may be more appropriate for standalone systems. The configuration settings in the GUI are the same as those specified in the policy above. Windows Firewall Properties will be a link in the center pane after opening Windows Firewall with Advanced Security. The following Netsh command may also be used to configure this setting: "Netsh advfirewall set publicprofile logging maxfilesize 16384" or greater.

a
The Windows Firewall with Advanced Security must log dropped packets when connected to a public network.
AU-12 - Low - CCI-000172 - V-242007 - SV-242007r698262_rule
RMF Control
AU-12
Severity
Low
CCI
CCI-000172
Version
WNFWA-000028
Vuln IDs
  • V-242007
  • V-17446
Rule IDs
  • SV-242007r698262_rule
  • SV-54922
A firewall provides a line of defense against attack. To be effective, it must be enabled and properly configured. Logging of dropped packets for a public network connection will be enabled to maintain an audit trail of potential issues.
Checks: C-45282r698260_chk

If the firewall's Public Profile is not enabled (see V-17417), this requirement is also a finding. If the following policy-based registry value exists and is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\WindowsFirewall\PublicProfile\Logging\ Value Name: LogDroppedPackets Type: REG_DWORD Value: 0x00000001 (1) If the policy-based registry value does not exist, verify the following registry value. If it is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\PublicProfile\Logging\ Value Name: LogDroppedPackets Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-45241r698261_fix

The preferred method of configuring the firewall settings is with a policy, particularly in a domain environment. Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Windows Firewall with Advanced Security -> Windows Firewall with Advanced Security -> Windows Firewall Properties (this link will be in the right pane) -> Public Profile Tab -> Logging (select Customize), "Log dropped packets" to "Yes". In addition to using policies, systems may also be configured using the firewall GUI or Netsh commands. These methods may be more appropriate for standalone systems. The configuration settings in the GUI are the same as those specified in the policy above. Windows Firewall Properties will be a link in the center pane after opening Windows Firewall with Advanced Security. The following Netsh commands may also be used to configure this setting: "Netsh advfirewall set publicprofile logging droppedconnections enable". Or "Netsh advfirewall set allprofiles logging droppedconnections enable".

a
The Windows Firewall with Advanced Security must log successful connections when connected to a public network.
AU-14 - Low - CCI-001462 - V-242008 - SV-242008r698265_rule
RMF Control
AU-14
Severity
Low
CCI
CCI-001462
Version
WNFWA-000029
Vuln IDs
  • V-242008
  • V-17447
Rule IDs
  • SV-242008r698265_rule
  • SV-54923
A firewall provides a line of defense against attack. To be effective, it must be enabled and properly configured. Logging of successful connections for a public network connection will be enabled to maintain an audit trail if issues are discovered.
Checks: C-45283r698263_chk

If the firewall's Public Profile is not enabled (see V-17417), this requirement is also a finding. If the following policy-based registry value exists and is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\WindowsFirewall\PublicProfile\Logging\ Value Name: LogSuccessfulConnections Type: REG_DWORD Value: 0x00000001 (1) If the policy-based registry value does not exist, verify the following registry value. If it is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\PublicProfile\Logging\ Value Name: LogSuccessfulConnections Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-45242r698264_fix

The preferred method of configuring the firewall settings is with a policy, particularly in a domain environment. Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Windows Firewall with Advanced Security -> Windows Firewall with Advanced Security -> Windows Firewall Properties (this link will be in the right pane) -> Public Profile Tab -> Logging (select Customize), "Logged successful connections" to "Yes". In addition to using policies, systems may also be configured using the firewall GUI or Netsh commands. These methods may be more appropriate for standalone systems. The configuration settings in the GUI are the same as those specified in the policy above. Windows Firewall Properties will be a link in the center pane after opening Windows Firewall with Advanced Security. The following Netsh commands may also be used to configure this setting: "Netsh advfirewall set publicprofile logging allowedconnections enable". Or "Netsh advfirewall set allprofiles logging allowedconnections enable".

b
Inbound exceptions to the firewall on domain workstations must only allow authorized remote management hosts.
AC-17 - Medium - CCI-000067 - V-242009 - SV-242009r698268_rule
RMF Control
AC-17
Severity
Medium
CCI
CCI-000067
Version
WNFWA-000100
Vuln IDs
  • V-242009
  • V-36440
Rule IDs
  • SV-242009r698268_rule
  • SV-55086
Allowing inbound access to domain workstations from other systems may allow lateral movement across systems if credentials are compromised. Limiting inbound connections only from authorized remote management systems will help limit this exposure.
Checks: C-45284r698266_chk

This requirement is NA for servers and non domain workstations. Verify firewall exceptions for inbound connections on domain workstations only allow authorized management systems and remote management hosts. Review inbound firewall exception rules in Windows Firewall with Advanced Security. Firewall rules can be complex and should be reviewed with the firewall administrator. One method for restricting inbound connections is to only allow exceptions for a specific scope of remote IP addresses. If allowed inbound exceptions are not limited to authorized management systems and remote management hosts, this is a finding.

Fix: F-45243r698267_fix

Ensure firewall exceptions to inbound connections on domain workstations only allow authorized management systems and remote management hosts. Firewall rules can be complex and should be thoroughly tested before applying in a production environment. One method for restricting inbound connections is to only allow exceptions for a specific scope of remote IP addresses. For any inbound rules that allow connections from other systems, configure the Scope for Remote IP addresses to those of authorized management systems and remote management hosts. This may be defined as an IP address, subnet, or range. Apply the rule to all firewall profiles.