diff --git a/Directory.Build.props b/Directory.Build.props
index 794a16d..16339cb 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -6,6 +6,7 @@
 		<Copyright>https://github.com/dotnetcore/FastGithub</Copyright>
 		<RuntimeIdentifier>win-x64</RuntimeIdentifier>
 		<TargetFrameworks>net5.0;net6.0</TargetFrameworks>
+		<DisableImplicitNamespaceImports>true</DisableImplicitNamespaceImports>
 	</PropertyGroup>
 
 	<PropertyGroup Condition="'$(Configuration)'=='Release'">
diff --git a/FastGithub.DomainResolve/DomainResolver.cs b/FastGithub.DomainResolve/DomainResolver.cs
index 2dd894f..ee1d2a5 100644
--- a/FastGithub.DomainResolve/DomainResolver.cs
+++ b/FastGithub.DomainResolve/DomainResolver.cs
@@ -97,12 +97,6 @@ namespace FastGithub.DomainResolve
                 throw new FastGithubException($"dns{dns}解析不到{domain}的ip");
             }
 
-            // 不允许域名解析指向FastGithub自身造成消息死循环
-            if (LocalMachine.ContainsIPAddress(address) == true)
-            {
-                throw new FastGithubException($"dns{dns}被污染，解析{domain}为{address}");
-            }
-
             this.logger.LogInformation($"[{domain}->{address}]");
             return address;
         }
diff --git a/FastGithub.Http/HttpClient.cs b/FastGithub.Http/HttpClient.cs
index 2ff0389..910fb19 100644
--- a/FastGithub.Http/HttpClient.cs
+++ b/FastGithub.Http/HttpClient.cs
@@ -1,6 +1,9 @@
 using FastGithub.Configuration;
 using FastGithub.DomainResolve;
 using System.Net.Http;
+using System.Net.Http.Headers;
+using System.Threading;
+using System.Threading.Tasks;
 
 namespace FastGithub.Http
 {
@@ -9,6 +12,11 @@ namespace FastGithub.Http
     /// </summary>
     public class HttpClient : HttpMessageInvoker
     {
+        /// <summary>
+        /// 插入的UserAgent标记
+        /// </summary>
+        private readonly static ProductInfoHeaderValue userAgent = new(new ProductHeaderValue(nameof(FastGithub), "1.0"));
+
         /// <summary>
         /// http客户端
         /// </summary>
@@ -28,5 +36,21 @@ namespace FastGithub.Http
             : base(handler, disposeHandler)
         {
         }
+
+        /// <summary>
+        /// 发送请求
+        /// </summary>
+        /// <param name="request"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
+        {
+            if (request.Headers.UserAgent.Contains(userAgent))
+            {
+                throw new FastGithubException($"由于{request.RequestUri}实际指向了{nameof(FastGithub)}自身，{nameof(FastGithub)}已中断本次转发");
+            }
+            request.Headers.UserAgent.Add(userAgent);
+            return base.SendAsync(request, cancellationToken);
+        }
     }
 }
\ No newline at end of file
diff --git a/FastGithub.ReverseProxy/RequestLoggingMilldeware.cs b/FastGithub.ReverseProxy/RequestLoggingMilldeware.cs
index e838031..38423d2 100644
--- a/FastGithub.ReverseProxy/RequestLoggingMilldeware.cs
+++ b/FastGithub.ReverseProxy/RequestLoggingMilldeware.cs
@@ -10,15 +10,15 @@ namespace FastGithub.ReverseProxy
     /// <summary>
     /// 请求日志中间件
     /// </summary>
-    sealed class RequestLoggingMilldeware
+    sealed class RequestLoggingMiddleware
     {
-        private readonly ILogger<RequestLoggingMilldeware> logger;
+        private readonly ILogger<RequestLoggingMiddleware> logger;
 
         /// <summary>
         /// 请求日志中间件
         /// </summary>
         /// <param name="logger"></param>
-        public RequestLoggingMilldeware(ILogger<RequestLoggingMilldeware> logger)
+        public RequestLoggingMiddleware(ILogger<RequestLoggingMiddleware> logger)
         {
             this.logger = logger;
         }
@@ -31,8 +31,7 @@ namespace FastGithub.ReverseProxy
         /// <returns></returns>
         public async Task InvokeAsync(HttpContext context, RequestDelegate next)
         {
-            var stopwatch = new Stopwatch();
-            stopwatch.Start();
+            var stopwatch = Stopwatch.StartNew();
 
             try
             {
diff --git a/FastGithub.ReverseProxy/ReverseProxyApplicationBuilderExtensions.cs b/FastGithub.ReverseProxy/ReverseProxyApplicationBuilderExtensions.cs
index be7febd..8fcad59 100644
--- a/FastGithub.ReverseProxy/ReverseProxyApplicationBuilderExtensions.cs
+++ b/FastGithub.ReverseProxy/ReverseProxyApplicationBuilderExtensions.cs
@@ -16,8 +16,8 @@ namespace FastGithub
         /// <returns></returns>
         public static IApplicationBuilder UseRequestLogging(this IApplicationBuilder app)
         {
-            var middlware = app.ApplicationServices.GetRequiredService<RequestLoggingMilldeware>();
-            return app.Use(next => context => middlware.InvokeAsync(context, next));
+            var middleware = app.ApplicationServices.GetRequiredService<RequestLoggingMiddleware>();
+            return app.Use(next => context => middleware.InvokeAsync(context, next));
         }
 
         /// <summary>
diff --git a/FastGithub.ReverseProxy/ReverseProxyServiceCollectionExtensions.cs b/FastGithub.ReverseProxy/ReverseProxyServiceCollectionExtensions.cs
index 1e1bddd..ea7bb81 100644
--- a/FastGithub.ReverseProxy/ReverseProxyServiceCollectionExtensions.cs
+++ b/FastGithub.ReverseProxy/ReverseProxyServiceCollectionExtensions.cs
@@ -19,7 +19,7 @@ namespace FastGithub
                 .AddMemoryCache()
                 .AddHttpForwarder()
                 .AddSingleton<CertService>()
-                .AddSingleton<RequestLoggingMilldeware>()
+                .AddSingleton<RequestLoggingMiddleware>()
                 .AddSingleton<ReverseProxyMiddleware>();
         }
     }
diff --git a/FastGithub/Views/_ViewStart.cshtml b/FastGithub/Views/_ViewStart.cshtml
index a5f1004..5f28270 100644
--- a/FastGithub/Views/_ViewStart.cshtml
+++ b/FastGithub/Views/_ViewStart.cshtml
@@ -1,3 +1 @@
-@{
-    Layout = "_Layout";
-}
+
\ No newline at end of file