diff --git a/FastGithub.Core/DomainConfig.cs b/FastGithub.Core/DomainConfig.cs
index 345d1a7..bbde172 100644
--- a/FastGithub.Core/DomainConfig.cs
+++ b/FastGithub.Core/DomainConfig.cs
@@ -12,6 +12,11 @@ namespace FastGithub
         /// </summary>
         public bool TlsSni { get; init; }
 
+        /// <summary>
+        /// 自定义SNI值的表达式
+        /// </summary>
+        public string? TlsSniPattern { get; init; }
+
         /// <summary>
         /// 请求超时时长
         /// </summary>
@@ -27,5 +32,22 @@ namespace FastGithub
         /// 自定义响应
         /// </summary>
         public ResponseConfig? Response { get; init; }
+
+        /// <summary>
+        /// 获取TlsSniPattern
+        /// </summary>
+        /// <returns></returns>
+        public TlsSniPattern GetTlsSniPattern()
+        {
+            if (this.TlsSni == false)
+            {
+                return FastGithub.TlsSniPattern.None;
+            }
+            if (string.IsNullOrEmpty(this.TlsSniPattern))
+            {
+                return FastGithub.TlsSniPattern.Domain;
+            }
+            return new TlsSniPattern(this.TlsSniPattern);
+        }
     }
 }
diff --git a/FastGithub.Core/TlsSniPattern.cs b/FastGithub.Core/TlsSniPattern.cs
new file mode 100644
index 0000000..f1af0f9
--- /dev/null
+++ b/FastGithub.Core/TlsSniPattern.cs
@@ -0,0 +1,86 @@
+using System;
+using System.Net;
+
+namespace FastGithub
+{
+    /// <summary>
+    /// Sni自定义值表达式
+    /// @domain变量表示取域名值
+    /// @ipadress变量表示取ip
+    /// @random变量表示取随机值
+    /// </summary> 
+    public struct TlsSniPattern
+    {
+        /// <summary>
+        /// 获取表示式值
+        /// </summary>
+        public string Value { get; }
+
+        /// <summary>
+        /// 无SNI
+        /// </summary>
+        public static TlsSniPattern None { get; } = new TlsSniPattern(string.Empty);
+
+        /// <summary>
+        /// 域名SNI
+        /// </summary>
+        public static TlsSniPattern Domain { get; } = new TlsSniPattern("@domain");
+
+        /// <summary>
+        /// IP值的SNI
+        /// </summary>
+        public static TlsSniPattern IPAddress { get; } = new TlsSniPattern("@ipaddress");
+
+        /// <summary>
+        /// 随机值的SNI
+        /// </summary>
+        public static TlsSniPattern Random { get; } = new TlsSniPattern("@random");
+
+        /// <summary>
+        /// Sni自定义值表达式
+        /// </summary>
+        /// <param name="value">表示式值</param>
+        public TlsSniPattern(string value)
+        {
+            this.Value = value;
+        }
+
+        /// <summary>
+        /// 更新域名
+        /// </summary>
+        /// <param name="domain"></param>
+        public TlsSniPattern WithDomain(string domain)
+        {
+            var value = this.Value.Replace(Domain.Value, domain, StringComparison.OrdinalIgnoreCase);
+            return new TlsSniPattern(value);
+        }
+
+        /// <summary>
+        /// 更新ip地址
+        /// </summary>
+        /// <param name="address"></param>
+        public TlsSniPattern WithIPAddress(IPAddress address)
+        {
+            var value = this.Value.Replace(IPAddress.Value, address.ToString(), StringComparison.OrdinalIgnoreCase);
+            return new TlsSniPattern(value);
+        }
+
+        /// <summary>
+        /// 更新随机数
+        /// </summary>
+        public TlsSniPattern WithRandom()
+        {
+            var value = this.Value.Replace(Random.Value, Environment.TickCount64.ToString(), StringComparison.OrdinalIgnoreCase);
+            return new TlsSniPattern(value);
+        }
+
+        /// <summary>
+        /// 转换为文本
+        /// </summary>
+        /// <returns></returns>
+        public override string ToString()
+        {
+            return this.Value;
+        }
+    }
+}
diff --git a/FastGithub.ReverseProxy/HttpClient.cs b/FastGithub.ReverseProxy/HttpClient.cs
index fedb9ae..a8c4887 100644
--- a/FastGithub.ReverseProxy/HttpClient.cs
+++ b/FastGithub.ReverseProxy/HttpClient.cs
@@ -10,18 +10,18 @@ namespace FastGithub.ReverseProxy
     /// </summary>
     class HttpClient : HttpMessageInvoker
     {
-        private readonly string tlsSniValue;
+        private readonly TlsSniPattern tlsSniPattern;
 
         /// <summary>
         /// YARP的HttpClient
         /// </summary>
         /// <param name="handler"></param>
-        /// <param name="tlsSniValue"></param>
+        /// <param name="tlsSniPattern"></param>
         /// <param name="disposeHandler"></param>
-        public HttpClient(HttpMessageHandler handler, string tlsSniValue, bool disposeHandler = false) :
+        public HttpClient(HttpMessageHandler handler, TlsSniPattern tlsSniPattern, bool disposeHandler = false) :
             base(handler, disposeHandler)
         {
-            this.tlsSniValue = tlsSniValue;
+            this.tlsSniPattern = tlsSniPattern;
         }
 
         /// <summary>
@@ -33,7 +33,7 @@ namespace FastGithub.ReverseProxy
         public override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
         {
             var isHttps = request.RequestUri?.Scheme == Uri.UriSchemeHttps;
-            request.SetSniContext(new SniContext(isHttps, this.tlsSniValue));
+            request.SetTlsSniContext(new TlsSniContext(isHttps, this.tlsSniPattern));
             return base.SendAsync(request, cancellationToken);
         }
     }
diff --git a/FastGithub.ReverseProxy/HttpClientHanlder.cs b/FastGithub.ReverseProxy/HttpClientHanlder.cs
index 7063332..2e2c18a 100644
--- a/FastGithub.ReverseProxy/HttpClientHanlder.cs
+++ b/FastGithub.ReverseProxy/HttpClientHanlder.cs
@@ -35,13 +35,14 @@ namespace FastGithub.ReverseProxy
                 Proxy = null,
                 UseProxy = false,
                 AllowAutoRedirect = false,
-                ConnectCallback = async (ctx, ct) =>
+                ConnectCallback = async (context, cancellationToken) =>
                 {
                     var socket = new Socket(SocketType.Stream, ProtocolType.Tcp);
-                    await socket.ConnectAsync(ctx.DnsEndPoint, ct);
+                    await socket.ConnectAsync(context.DnsEndPoint, cancellationToken);
                     var stream = new NetworkStream(socket, ownsSocket: true);
-                    var sniContext = ctx.InitialRequestMessage.GetSniContext();
-                    if (sniContext.IsHttps == false)
+
+                    var tlsSniContext = context.InitialRequestMessage.GetTlsSniContext();
+                    if (tlsSniContext.IsHttps == false)
                     {
                         return stream;
                     }
@@ -49,9 +50,9 @@ namespace FastGithub.ReverseProxy
                     var sslStream = new SslStream(stream, leaveInnerStreamOpen: false);
                     await sslStream.AuthenticateAsClientAsync(new SslClientAuthenticationOptions
                     {
-                        TargetHost = sniContext.TlsSniValue,
+                        TargetHost = tlsSniContext.TlsSniPattern.Value,
                         RemoteCertificateValidationCallback = delegate { return true; }
-                    }, ct);
+                    }, cancellationToken);
                     return sslStream;
                 }
             };
@@ -76,6 +77,9 @@ namespace FastGithub.ReverseProxy
                 };
                 request.RequestUri = builder.Uri;
                 request.Headers.Host = uri.Host;
+
+                var context = request.GetTlsSniContext();
+                context.TlsSniPattern = context.TlsSniPattern.WithDomain(uri.Host).WithIPAddress(address).WithRandom();
             }
             return await base.SendAsync(request, cancellationToken);
         }
diff --git a/FastGithub.ReverseProxy/ReverseProxyMiddleware.cs b/FastGithub.ReverseProxy/ReverseProxyMiddleware.cs
index c92edb5..dec5eb4 100644
--- a/FastGithub.ReverseProxy/ReverseProxyMiddleware.cs
+++ b/FastGithub.ReverseProxy/ReverseProxyMiddleware.cs
@@ -56,10 +56,10 @@ namespace FastGithub.ReverseProxy
                 var destinationPrefix = GetDestinationPrefix(host, domainConfig.Destination);
                 var requestConfig = new ForwarderRequestConfig { Timeout = domainConfig.Timeout };
 
-                var tlsSniValue = domainConfig.TlsSni ? destinationPrefix.Host : string.Empty;
-                using var httpClient = new HttpClient(this.httpClientHanlder, tlsSniValue);
+                var tlsSniPattern = domainConfig.GetTlsSniPattern();
+                using var httpClient = new HttpClient(this.httpClientHanlder, tlsSniPattern);
 
-                var error = await httpForwarder.SendAsync(context, destinationPrefix.ToString(), httpClient, requestConfig);
+                var error = await httpForwarder.SendAsync(context, destinationPrefix, httpClient, requestConfig);
                 await ResponseErrorAsync(context, error);
             }
         }
@@ -70,15 +70,16 @@ namespace FastGithub.ReverseProxy
         /// <param name="host"></param> 
         /// <param name="destination"></param>
         /// <returns></returns>
-        private Uri GetDestinationPrefix(string host, Uri? destination)
+        private string GetDestinationPrefix(string host, Uri? destination)
         {
-            var defaultValue = new Uri($"https://{host}/");
+            var defaultValue = $"https://{host}/";
             if (destination == null)
             {
                 return defaultValue;
             }
 
-            var result = new Uri(defaultValue, destination);
+            var baseUri = new Uri(defaultValue);
+            var result = new Uri(baseUri, destination).ToString();
             this.logger.LogInformation($"[{defaultValue}->{result}]");
             return result;
         }
diff --git a/FastGithub.ReverseProxy/SniContext.cs b/FastGithub.ReverseProxy/TlsSniContext.cs
similarity index 59%
rename from FastGithub.ReverseProxy/SniContext.cs
rename to FastGithub.ReverseProxy/TlsSniContext.cs
index 5c33d02..0e308d5 100644
--- a/FastGithub.ReverseProxy/SniContext.cs
+++ b/FastGithub.ReverseProxy/TlsSniContext.cs
@@ -3,7 +3,7 @@
     /// <summary>
     /// Sni上下文
     /// </summary>
-    sealed class SniContext
+    sealed class TlsSniContext
     {
         /// <summary>
         /// 获取是否为https请求
@@ -11,19 +11,19 @@
         public bool IsHttps { get; }
 
         /// <summary>
-        /// 获取Sni值
+        /// 获取或设置Sni值的表达式 
         /// </summary>
-        public string TlsSniValue { get; }
+        public TlsSniPattern TlsSniPattern { get; set; }
 
         /// <summary>
         /// Sni上下文
         /// </summary>
         /// <param name="isHttps"></param>
-        /// <param name="tlsSniValue"></param>
-        public SniContext(bool isHttps, string tlsSniValue)
+        /// <param name="tlsSniPattern"></param>
+        public TlsSniContext(bool isHttps, TlsSniPattern tlsSniPattern)
         {
             this.IsHttps = isHttps;
-            this.TlsSniValue = tlsSniValue;
+            this.TlsSniPattern = tlsSniPattern;
         }
     }
 }
diff --git a/FastGithub.ReverseProxy/SniContextExtensions.cs b/FastGithub.ReverseProxy/TlsSniContextExtensions.cs
similarity index 61%
rename from FastGithub.ReverseProxy/SniContextExtensions.cs
rename to FastGithub.ReverseProxy/TlsSniContextExtensions.cs
index da9cb3d..0d44351 100644
--- a/FastGithub.ReverseProxy/SniContextExtensions.cs
+++ b/FastGithub.ReverseProxy/TlsSniContextExtensions.cs
@@ -6,32 +6,32 @@ namespace FastGithub.ReverseProxy
     /// <summary>
     /// SniContext扩展
     /// </summary>
-    static class SniContextExtensions
+    static class TlsSniContextExtensions
     {
-        private static readonly HttpRequestOptionsKey<SniContext> key = new(nameof(SniContext));
+        private static readonly HttpRequestOptionsKey<TlsSniContext> key = new(nameof(TlsSniContext));
 
         /// <summary>
-        /// 设置SniContext
+        /// 设置TlsSniContext
         /// </summary>
         /// <param name="httpRequestMessage"></param>
         /// <param name="context"></param>
-        public static void SetSniContext(this HttpRequestMessage httpRequestMessage, SniContext context)
+        public static void SetTlsSniContext(this HttpRequestMessage httpRequestMessage, TlsSniContext context)
         {
             httpRequestMessage.Options.Set(key, context);
         }
 
         /// <summary>
-        /// 获取SniContext
+        /// 获取TlsSniContext
         /// </summary>
         /// <param name="httpRequestMessage"></param>
         /// <returns></returns>
-        public static SniContext GetSniContext(this HttpRequestMessage httpRequestMessage)
+        public static TlsSniContext GetTlsSniContext(this HttpRequestMessage httpRequestMessage)
         {
             if (httpRequestMessage.Options.TryGetValue(key, out var value))
             {
                 return value;
             }
-            throw new InvalidOperationException($"请先调用{nameof(SetSniContext)}");
+            throw new InvalidOperationException($"请先调用{nameof(SetTlsSniContext)}");
         }
     }
 }
diff --git a/FastGithub/appsettings.json b/FastGithub/appsettings.json
index 03c8323..696de65 100644
--- a/FastGithub/appsettings.json
+++ b/FastGithub/appsettings.json
@@ -11,6 +11,7 @@
     "DomainConfigs": { // 域名的*表示0到多个任意字符
       "github.com": {
         "TlsSni": false, // 指示tls握手时是否发送SNI
+        "TlsSniPattern": null, // SNI表达式，@domain变量表示取域名值 @ipadress变量表示取ip @random变量表示取随机值，其它字符保留不替换
         "Timeout": null, // 请求超时时长，格式为"00:02:00"，默认为null
         "Destination": null // 请求目的地，格式为绝对或相对Uri，默认null
       },