IIS中按URL的请求速率限制

Question

在我的应用程序中，我希望将请求限制为要由服务器处理的网站登录页面，如果请求增加了特定数量，则IIS应该在一段时间内阻止该IP地址。我已经通过IIS的“ IP地址和域限制”功能，但是如果请求来自登录页面而不是网站上其他页面和操作的请求，我想阻止该请求。我们如何使用IIS实现这一目标？

Answer 1

IIS IP限制只能用于站点级别。您不能为特定控制器或文件夹设置动态IP限制。因此，建议改用自定义httpmodule。您可以在此代码中添加一个过滤器，以使httpmodule仅在您的登录页面上验证点击数。

CS1

public class UrlReWrite : IHttpModule
        {

            private int rowCount = Convert.ToInt32(ConfigurationManager.AppSettings["HttpRowCount"]);

            private int httpTime = Convert.ToInt32(ConfigurationManager.AppSettings["HttpTime"]);
            public void Init(HttpApplication application)
            {
                application.BeginRequest += (new
                   EventHandler(this.Application_BeginRequest));
                application.EndRequest += (new
                   EventHandler(this.Application_EndRequest));
            }
            private void Application_BeginRequest(Object source, EventArgs e)
            {
                HttpApplication Application = (HttpApplication)source;
                HttpContext ctx = Application.Context;

                string isIp = ctx.Request.UserHostAddress;
                if (ctx.Application["time"] == null)
                {
                    ctx.Application["time"] = DateTime.Now;
                }
                else
                {
                    DateTime isTime = (DateTime)ctx.Application["time"];
                    int timeTract = Convert.ToInt32(DateTime.Now.Subtract(isTime).Minutes.ToString());
                    if (timeTract > (httpTime - 1))
                    {
                        ctx.Application["time"] = null;
                        ctx.Application["myip"] = null;
                    }
                }
                if (ctx.Application["myip"] != null && ctx.Application["myip"] is CartIp)
                {
                    CartIp cartIp = (CartIp)ctx.Application["myip"];
                    cartIp.Insert(isIp);
                    ctx.Application["myip"] = cartIp;
                    if (cartIp.GetCount(isIp) > rowCount)
                    {
                        ctx.Response.Clear();
                        ctx.Response.Close();
                    }
                }
                else
                {
                    CartIp cartIp = new CartIp();
                    cartIp.Insert(isIp);
                    HttpContext.Current.Application["myip"] = cartIp;
                }
            }
            private void Application_EndRequest(Object source, EventArgs e)
            {
            }
            public void Dispose()
            {
            }
        }
    }

class2.cs
[Serializable]
    public class ListIp
    {
        private string ip;
        private int count;

        public string IP
        {
            get { return ip; }
            set { ip = value; }
        }

        public int Count
        {
            get { return count; }
            set { count = value; }
        }
    }
    [Serializable]
    public class CartIp
    {
        public CartIp()
        {
            if (_listIp == null)
            {
                _listIp = new List<ListIp>();
            }
        }
        private List<ListIp> _listIp;
        public List<ListIp> _ListIp
        {
            get { return _listIp; }
            set { _listIp = value; }
        }

        public void Insert(string ip)
        {
            int indexof = ItemLastInfo(ip);
            if (indexof == -1)
            {

                ListIp item = new ListIp();
                item.IP = ip;
                _listIp.Add(item);
            }
            else
            {
                _listIp[indexof].Count += 1;
            }
        }

    public int ItemLastInfo(string ip)
    {
        int index = 0;
        foreach (ListIp item in _ListIp)
        {
            if (item.IP == ip)
            {
                return index;
            }
            index += 1;
        }
        return -1;
    }
    /// <summary>
    /// get number of IP address
    /// </summary>
    /// <param name="ip"></param>
    /// <returns></returns>
    public int GetCount(string ip)
    {
        foreach (ListIp item in _ListIp)
        {
            if (item.IP == ip)
            {
                return item.Count;
            }
        }
        return -1;
    }
}

web.config
<appSettings>
<add key="HttpRowCount" value="100"/>
<add key="HttpTime" value="10"/>
</appSettings>

您只需要创建一个类库。然后复制并修改这些代码以实现您的要求。最后，您需要将发行版dll复制到bin文件夹，然后通过IIS管理器->站点节点->模块->添加托管模块将其导入。
https://www.cnblogs.com/Fooo/archive/2013/01/27/2878820.html