IFPCLowLevelSettings::DnsCacheSize property

Applies to: desktop apps only

The DnsCacheSize property gets or sets the maximum size of the DNS cache for the Microsoft Firewall service.

This property is read/write.


HRESULT put_DnsCacheSize(
  long lDnsCacheSize

HRESULT get_DnsCacheSize(
  long *plDnsCacheSize
' Data type: Long

Property DnsCacheSize( _
  ByVal lDnsCacheSize As long, _
  ByVal plDnsCacheSize As long _
) As Long

Property value

A 32-bit integer that specifies the maximum size of the DNS cache for the Firewall service.

Error codes

These property methods return S_OK if the call is successful; otherwise, they return an error code.


This property is read/write. Its default value is 10,000, and its range of permissible values is from 0 through 100,000.

After the value of this property has been modified, the change must be written to persistent storage by calling the Save method on an object containing FPCLowLevelSettings as a subobject, and the Microsoft Firewall service must be restarted for the change to take effect. For more information about restarting the Firewall service to apply changes, see Restarting Services After Configuration Changes.

This property cannot be accessed through Forefront TMG Management.


Minimum supported client

Windows Vista

Minimum supported server

Windows Server 2008 R2, Windows Server 2008 with SP2 (64-bit only)


Forefront Threat Management Gateway (TMG) 2010





See also




Build date: 7/12/2010