以編程方式管理 Windows 防火牆

Question

我正在嘗試以編程方式創建出站 Windows 防火牆規則。 此外，我想以編程方式啟用和禁用此規則。 我怎樣才能在 C# 中做到這一點？ 手動，我可以通過進入控制面板，單擊 Windows 防火牆，然后單擊高級設置來執行此操作。

Answer 1

最好使用 Windows 庫 C:\\windows\\system32\\FirewallAPI.dll。 此 DLL 自 Windows 7 起可用。如果您將其添加到項目引用中，Visual Studio 將自動為此 COM 庫添加包裝器，或者您可以使用 tlbimp.exe 手動創建包裝器。

using NetFwTypeLib;

INetFwRule firewallRule = (INetFwRule)Activator.CreateInstance(Type.GetTypeFromProgID("HNetCfg.FWRule"));
firewallRule.Action = NET_FW_ACTION_.NET_FW_ACTION_BLOCK;
firewallRule.Description = "Your rule description";
firewallRule.Direction = NET_FW_RULE_DIRECTION_.NET_FW_RULE_DIR_IN; // inbound
firewallRule.Enabled = true;
firewallRule.InterfaceTypes = "All";
firewallRule.RemoteAddresses = "1.2.3.0/24"; // add more blocks comma separated
firewallRule.Name = "You rule name";
firewallPolicy.Rules.Add(firewallRule);

VS IntelliSense 應該為您提供有關該庫的足夠詳細信息。

Answer 2

您可以將 netsh advfirewall 命令語法包裝到一個小型庫中，以允許您按需啟用/禁用設置。 如果失敗，請參閱http://msdn.microsoft.com/en-us/library/windows/desktop/ff956124(v=vs.85).aspx了解具有高級安全 API 的 Windows 防火牆。

Answer 3

你可以使用這個 nuget 包WindowsFirewallHelper

PM> Install-Package WindowsFirewallHelper

示例代碼為應用程序添加新的出站規則

var rule = FirewallManager.Instance.CreateApplicationRule(
    @"MyApp Rule",
    FirewallAction.Allow,
    @"C:\MyApp.exe"
);
rule.Direction = FirewallDirection.Outbound;
FirewallManager.Instance.Rules.Add(rule);

Answer 4

您可以使用“netsh”命令。 制作一個方法來調用它。
如果您不想引用FirewallAPI.dll或安裝 nuget WindowsFirewallHelper請使用此選項。

例子：

        /// <summary>
        /// Creates a Firewall Rule on current computer. Uses 'netsh'
        /// </summary>
        /// <param name="rulename"></param>
        /// <param name="protocol"></param>
        /// <param name="port"></param>
        /// <param name="direction">"in" or "out"</param>
        /// <param name="action"></param>
        /// <returns>netsh command response</returns>
        public static string CreateFirewalPort(string rulename, string protocol, int port, string direction = "in", string action = "allow")
        {
            // https://support.microsoft.com/en-us/help/947709/how-to-use-the-netsh-advfirewall-firewall-context-instead-of-the-netsh

            //Remove any rule with the same name. Otherwise every time you run this code a new rule is added.  
            Process removeproc = new Process
            {
                StartInfo = {
                    FileName = "netsh",
                    Arguments = $@"advfirewall firewall delete rule name=""{rulename}""",
                    UseShellExecute = false,
                    WindowStyle = ProcessWindowStyle.Hidden,
                    RedirectStandardOutput = true
                }
            };
            try
            {
                removeproc.Start();
                var output = removeproc.StandardOutput.ReadToEnd();
                removeproc.WaitForExit();
            }
            catch (Exception ex)
            {
                Log.Info(ex.Message);
            }

            Process process = new Process
            {
                StartInfo = {
                    FileName = "netsh",
                    Arguments = $@"advfirewall firewall add rule name=""{rulename}"" protocol={protocol} localport={port} dir={direction} action={action}",
                    UseShellExecute = false,
                    WindowStyle = ProcessWindowStyle.Hidden,
                    RedirectStandardOutput = true
                }
            };

            try
            {
                process.Start();
                var output = process.StandardOutput.ReadToEnd();
                process.WaitForExit();
                return output;
            }
            catch (Exception ex)
            {
                return ex.ExceptionToString();
            }
        }