1.Startup.cs添加 app.UseForwardedHeaders(new ForwardedHeadersOptions { ForwardedHeaders = ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto }); 2.扩展方法 public static string GetClientUserIp(this HttpContext context) { var ip = context.Request.Headers["X-Forwarded-For"].FirstOrDefault(); if (string.IsNullOrEmpty(ip)) { ip = context.Connection.RemoteIpAddress.ToString(); } return ip; } 3.nginx配置 location /API { proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_pass http://localhost:5000; }