DnsCacheNegativeTtl Property of the IFPCLowLevelSettings Interface

The DnsCacheNegativeTtl property gets or sets the TTL, in seconds, of entries for unsuccessful lookups in the DNS cache.

[C++]

HRESULT put_DnsCacheNegativeTtl(
	long lTTL
);
HRESULT get_DnsCacheNegativeTtl(
	long* plTTL
);

plTTL: Pointer to a variable that on return receives a 32-bit integer specifying the TTL, in seconds, of entries for unsuccessful lookups in the DNS cache.
lTTL: A 32-bit integer that specifies the TTL, in seconds, of entries for unsuccessful lookups in the DNS cache.

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

[Visual Basic]

Property DnsCacheNegativeTtl As Long

A 32-bit integer that specifies the TTL, in seconds, of entries for unsuccessful lookups in the DNS cache.

This property is read/write. Its default value is 300 seconds (5 minutes).

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.

Client	Requires Windows Vista or Windows XP.
Server	Requires Windows Server 2008.
Version	Requires Forefront Threat Management Gateway (TMG).
IDL	Declared in Msfpccom.idl.
DLL	Requires Msfpccom.dll.