Creating Rules Based on Time (Windows Embedded CE 6.0)
1/6/2010
The following table shows an example of how to create rules based on time. In this case, outbound traffic from the specified host is allowed between 9:00 PM and 8:00 AM.
| dwFlags | wHourStart | wHourEnd |
|---|---|---|
FWF_BLOCK | FWF_OUTBOUND |
|
|
FWF_ALLOW | FWF_OUTBOUND |
21 |
8 |
Registry entries for the rule
The following registry example shows the registry entries for this rule.
[HKEY_LOCAL_MACHINE\COMM\Firewall\Rules\BlockOutbound]
"Mask"=dword:0 ;
"Flags"=dword:11 ; FWF_BLOCK | FWF_OUTBOUND
"PrivateHost"=hex:02,00 ; AF_INET
[HKEY_LOCAL_MACHINE\COMM\Firewall\Rules\AllowOutbound9p8a]
"Mask"=dword:80 ; FWM_TIME_OF_DAY
"Flags"=dword:12 ; FWF_ALLOW | FWF_OUTBOUND
"PrivateHost"=hex:02,00 ; AF_INET
"HourStart"=dword:15 ; 9 PM
"HourEnd"=dword:8 ; 8 AM
Code example to create the rule
The following code example shows this rule.
FW_RULE BlockOutbound;
// The following fields must always be set.
BlockOutbound.dwSize = sizeof(FW_RULE);
BlockOutbound.dwFlags = FWF_BLOCK | FWF_OUTBOUND;
BlockOutbound.dwMask = 0;
BlockOutbound.PrivateHost.Family = AF_INET;
BlockOutbound.wszDescription = L"Block outbound traffic";
// Create a persistent rule.
FirewallCreateRule(&BlockOutbound, TRUE);
FW_RULE AllowOutbound9p8a;
// The following fields must always be set.
AllowOutbound9p8a.dwSize = sizeof(FW_RULE);
AllowOutbound9p8a.dwFlags = FWF_ALLOW | FWF_OUTBOUND;
AllowOutbound9p8a.dwMask = FWM_TIME_OF_DAY;
AllowOutbound9p8a.PrivateHost.Family = AF_INET;
AllowOutbound9p8a.wszDescription = L"Allow outbound traffic from the specified host between the 9 PM and 8 AM";
// Time of day.
AllowOutbound9p8a.wHourStart = 21;
AllowOutbound9p8a.wHourEnd = 8;
// Create a persistent rule.
FirewallCreateRule(&AllowOutbound9p8a, TRUE);