在編程控制防火牆前先要有個前提，就是你必須是管理員權限， 這樣本例的程序才能用"Run as administrator"的方式運行，並成功修改。 如果你本身就是用Administrator這個用戶登錄的話，直接運行就行了。 建議最好在這個用戶下來調試程序。
本程序只是個初始的例子，裡面的功能只開發了一部分，各位有興趣的話可以繼續深入運用。 像Vista的防火牆就比較Bt，除了基本設定外，在"Control Panel\Administrative Tools\Windows Firewall with Advanced Security" 還有高級設定，好像用程序都可控制。
FireWallManager 程序主要功能有
1. public void FireWallTrigger（ bool enable ） //開關防火牆。 貌似在Vista裡面有問題，XP sp2好像可以。 但是用INetFwPolicy2.set_FirewallEnabled的方法的話，Vista也能搞定。
2. public void FireWallService（ string name， bool enable ） //開關防火牆服務程序，一般裡面的 File and Printer Sharing 服務比較有用。
3. public bool AddPort（ string portName， int portNumber， string protocol ） // 開啟一個端口。
4. public bool RemovePort（ int portNumber， string protocol ） //刪除開啟的端口
5. public bool AddAplication（ string discriptionName， string fileName ） //開啟放行應用程序
6. public bool RemoveApplication（ string fileName ） // 關閉放行的應用程序。
裡面還有個 protected Object getInstance（ String typeName ） 本來是用CLSID來實例化那些接口的，後來發現ProgID其實更簡單，不需要查，裡面有個規律，只需把接口的INet刪掉就是ProgID了。 如 INetFwOpenPort port = （ INetFwOpenPort ）Activator.CreateInstance（ Type.GetTypeFromProgID（ "HNetCfg.FwOpenPort" ） ）； 中 INetFwOpenPort 與 FwOpenPort.
首先，創建一個Console程序，在程序中添加引用，在COM對象中找到"NetFwTypeLib" ，添加即可。 防火牆主要是靠這個對象操作的。 貌似不止Vista， Xp也是一樣的。核心程序如下：
FireWallManager.cs
using System;
using System.Collections.Generic;
using System.Text;
using NetFwTypeLib;
namespace FirewallManager
{
class FwManager
{
private INetFwMgr NetFwMgr;
private INetFwProfile NetFwProfile;
private INetFwPolicy2 NetFwPolicy2; //this interface contains lots of usefull functions．
public FwManager()
{
//Create Com Object
//Type NetFwMgrType = Type.GetTypeFromCLSID( new Guid( "{304CE942-6E39-40D8-943A-B913C40C9CD4}" ) );
Type NetFwMgrType = Type.GetTypeFromProgID( "HNetCfg.FwMgr" );
object NetFwMgrObject = Activator.CreateIn
stance( NetFwMgrType );
NetFwMgr = ( INetFwMgr )NetFwMgrObject;
NetFwProfile = NetFwMgr.LocalPolicy.CurrentProfile;
Type NetFwPolicy2Type = Type.GetTypeFromProgID( "HNetCfg.FwPolicy2" );
object NetFwPolicy2Object = System.Activator.CreateInstance( NetFwPolicy2Type );
NetFwPolicy2 = ( INetFwPolicy2 )NetFwPolicy2Object;
}
public void ShowInfo()
{
switch( NetFwProfile.Type )
{
case NET_FW_PROFILE_TYPE_.NET_FW_PROFILE_DOMAIN:
Console.WriteLine( "Network Profile Type1: " + "Domain" );
break;
case NET_FW_PROFILE_TYPE_.NET_FW_PROFILE_STANDARD:
Console.WriteLine( "Network Profile Type1: " + "Standard" );
break;
case NET_FW_PROFILE_TYPE_.NET_FW_PROFILE_CURRENT:
Console.WriteLine( "Network Profile Type1: " + "Current" );
break;
case NET_FW_PROFILE_TYPE_.NET_FW_PROFILE_TYPE_MAX:
Console.WriteLine( "Network Profile Type1: " + "Max" );
break;
}
switch( ( NET_FW_PROFILE_TYPE2_ )NetFwPolicy2.CurrentProfileTypes )
{
case NET_FW_PROFILE_TYPE2_.NET_FW_PROFILE2_DOMAIN:
Console.WriteLine( "Network Profile Type2: " + "Domain" );
break;
case NET_FW_PROFILE_TYPE2_.NET_FW_PROFILE2_PRIVATE:
Console.WriteLine( "Network Profile Type2: " + "Private" );
break;
case NET_FW_PROFILE_TYPE2_.NET_FW_PROFILE2_PUBLIC:
Console.WriteLine( "Network Profile Type2: " + "Public" );
break;
case NET_FW_PROFILE_TYPE2_.NET_FW_PROFILE2_ALL:
Console.WriteLine( "Network Profile Type2: " + "All" );
break;
}
Console.WriteLine( "Firewall Enabled: " + NetFwProfile.FirewallEnabled );
Console.WriteLine( "Exceptions Not Allowed: " + NetFwProfile.ExceptionsNotAllowed );
Console.WriteLine( "Notifications Disabled: " + NetFwProfile.NotificationsDisabled );
//Console.WriteLine("UnicastResponsestoMulticastBroadcastDisabled: " + NetFwProfile.UnicastResponsestoMulticastBroadcastDisabled);
//Remote Admin
INetFwRemoteAdminSettings RASettings = NetFwP
rofile.RemoteAdminSettings;
Console.WriteLine( "Remote Administration Enabled: " + RASettings.Enabled );
switch( RASettings.IpVersion )
{
case NET_FW_IP_VERSION_.NET_FW_IP_VERSION_V4:
Console.WriteLine( "Remote Administration IP Version: V4" );
break;
case NET_FW_IP_VERSION_.NET_FW_IP_VERSION_V6:
Console.WriteLine( "Remote Administration IP Version: V6" );
break;
case NET_FW_IP_VERSION_.NET_FW_IP_VERSION_MAX:
Console.WriteLine( "Remote Administration IP Version: MAX" );
break;
case NET_FW_IP_VERSION_.NET_FW_IP_VERSION_ANY:
Console.WriteLine( "Remote Administration IP Version: ANY" );
break;
}
switch( RASettings.Scope )
{
case NET_FW_SCOPE_.NET_FW_SCOPE_ALL:
Console.WriteLine( "Remote Administration Scope: ALL" );
break;
case NET_FW_SCOPE_.NET_FW_SCOPE_CUSTOM:
Console.WriteLine( "Remote Administration Scope: Custom" );
break;
case NET_FW_SCOPE_.NET_FW_SCOPE_LOCAL_SUBNET:
Console.WriteLine( "Remote Administration Scope: Local Subnet" );
break;
case NET_FW_SCOPE_.NET_FW_SCOPE_MAX:
Console.WriteLine( "Remote Administration Scope: MAX" );
break;
}
// ICMP
INetFwIcmpSettings icmpSettings = NetFwProfile.IcmpSettings;
Console.WriteLine( "ICMP Settings:" );
Console.WriteLine( " AllowOutboundDestinationUnreachable: " + icmpSettings.AllowOutboundDestinationUnreachable );
Console.WriteLine( " AllowOutboundSourceQuench: " + icmpSettings.AllowOutboundSourceQuench );
Console.WriteLine( " AllowRedirect: " + icmpSettings.AllowRedirect );
Console.WriteLine( " AllowInboundEchoRequest: " + icmpSettings.AllowInboundEchoRequest );
Console.WriteLine( " AllowInboundRouterRequest: " + icmpSettings.AllowInboundRouterRequest );
Console.WriteLine( " AllowOutboundTimeExceeded: " + icmpSettings.AllowOutboundTimeExceeded );
Console.WriteLine( " AllowOutboundParameterProblem: " + icmpSettings.AllowOutboundParameterProblem );
Console
.WriteLine( " AllowInboundTimestampRequest: " + icmpSettings.AllowInboundTimestampRequest );
Console.WriteLine( " AllowInboundMaskRequest: " + icmpSettings.AllowInboundMaskRequest );
// Gloabal Open ports
foreach( INetFwOpenPort port in NetFwProfile.GloballyOpenPorts )
{
Console.WriteLine( "Open port: " + port.Name + ":" + port.Port + ", " + port.Protocol + " " + port.Enabled );
}
// Services
foreach( INetFwService serv in NetFwProfile.Services )
{
Console.WriteLine( "Service: " + serv.Name + ": " + serv.Enabled );
}
// Autorised Applications
foreach( INetFwAuthorizedApplication app in NetFwProfile.AuthorizedApplications )
{
Console.WriteLine( "AuthorizedApplication: " + app.Name + ": " + app.Enabled );
}
Console.WriteLine();
}
public void FireWallTrigger( bool enable )
{
try
{
NetFwProfile.FirewallEnabled = enable;
}
catch( Exception e )
{
Console.WriteLine( e.Message );
}
//try
//{
// NetFwPolicy2.set_FirewallEnabled( NET_FW_PROFILE_TYPE2_.NET_FW_PROFILE2_PRIVATE, enable );
/
