diff --git a/internal/controllers/agent_controller.go b/internal/controllers/agent_controller.go
index e5f0106..21e9471 100644
--- a/internal/controllers/agent_controller.go
+++ b/internal/controllers/agent_controller.go
@@ -404,6 +404,7 @@ func (c *AgentController) WSConnect(ctx *gin.Context) {
 		logger.Errorf("[AgentWS] 升级连接失败: %v, Agent #%s, IP=%s", err, agent.ID, ip)
 		return
 	}
+	conn.SetReadLimit(constant.MaxMessageSize)
 
 	// 连接成功，重置失败计数
 	c.wsManager.RecordConnectSuccess(ip)
diff --git a/internal/controllers/auth_controller.go b/internal/controllers/auth_controller.go
index 6b706a2..98c24d6 100644
--- a/internal/controllers/auth_controller.go
+++ b/internal/controllers/auth_controller.go
@@ -181,19 +181,21 @@ func (ac *AuthController) GetCurrentUser(c *gin.Context) {
 }
 
 func (ac *AuthController) Register(c *gin.Context) {
-	var req struct {
-		Username string `json:"username" binding:"required"`
-		Email    string `json:"email" binding:"required"`
-		Password string `json:"password" binding:"required"`
-	}
+	/*
+		var req struct {
+			Username string `json:"username" binding:"required"`
+			Email    string `json:"email" binding:"required"`
+			Password string `json:"password" binding:"required"`
+		}
 
-	if err := c.ShouldBindJSON(&req); err != nil {
-		utils.BadRequest(c, err.Error())
-		return
-	}
+		if err := c.ShouldBindJSON(&req); err != nil {
+			utils.BadRequest(c, err.Error())
+			return
+		}
 
-	// 安全性：强制设定角色为 user，防止注册时篡改角色为 admin
-	// 修复原代码中 email 和 password 参数位置颠倒的问题
-	user := ac.userService.CreateUser(req.Username, req.Password, req.Email, constant.DefaultRole)
-	utils.Success(c, vo.ToUserVO(user))
+		// 安全性：强制设定角色为 user，防止注册时篡改角色为 admin
+		user := ac.userService.CreateUser(req.Username, req.Password, req.Email, constant.DefaultRole)
+		utils.Success(c, vo.ToUserVO(user))
+	*/
+	utils.BadRequest(c, "注册功能已关闭")
 }
diff --git a/internal/middleware/auth.go b/internal/middleware/auth.go
index bdd1129..18b246d 100644
--- a/internal/middleware/auth.go
+++ b/internal/middleware/auth.go
@@ -27,7 +27,11 @@ func AuthRequired() gin.HandlerFunc {
 				origin = c.GetHeader("Referer")
 			}
 			// 如果有 Origin 且不匹配则拒绝（实际部署时应配置允许的 Origin）
-			// 这里由于是通用逻辑，暂且记录日志或做更严谨的校验
+			if origin != "" && !utils.CheckWSOrigin(c.Writer, c.Request) {
+				utils.Forbidden(c, "CSRF 校验失败: 非法的请求来源")
+				c.Abort()
+				return
+			}
 		}
 
 		token, err := c.Cookie(constant.CookieName)
diff --git a/internal/router/api_routes.go b/internal/router/api_routes.go
index 23f7f10..4bd5014 100644
--- a/internal/router/api_routes.go
+++ b/internal/router/api_routes.go
@@ -18,7 +18,7 @@ func initPublicAPIRoutes(api *gin.RouterGroup, c *Controllers) {
 	{
 		auth.POST("/login", c.Auth.Login)
 		auth.POST("/logout", c.Auth.Logout)
-		auth.POST("/register", c.Auth.Register)
+		// auth.POST("/register", c.Auth.Register)
 	}
 
 	// 公开的站点设置（无需认证）