如何通过流量数据包判断vps机器是否对外发起ddos，FLOOD-tcp硬件防火墙误报申诉

小樱

如何通过流量数据包判断vps机器是否对外发起ddos，FLOOD-tcp硬件防火墙误报申诉

服务商一份报告例子

FLOOD-tcp.1-eno1 detected! VPS is limited. Metric: 359312

VM: vm865164.u174709.kvm.centos-7-amd64-r2
MAC: ea:37:72:c2:15:c3

ea:37:72:c2:15:c3 > 00:1f:ce:00:00:1c, ethertype IPv4 (0x0800), length 54: 46.29.161.6.6961 > 111.60.201.57.52065: Flags [R.], seq 0, ack 4169257719, win 0, length 0
ea:37:72:c2:15:c3 > 00:1f:ce:00:00:1c, ethertype IPv4 (0x0800), length 54: 46.29.161.6.6961 > 111.192.227.244.56329: Flags [R.], seq 0, ack 2358622955, win 0, length 0
ea:37:72:c2:15:c3 > 00:1f:ce:00:00:1c, ethertype IPv4 (0x0800), length 54: 46.29.161.6.6961 > 61.140.126.129.57763: Flags [R.], seq 0, ack 565215881, win 0, length 0
ea:37:72:c2:15:c3 > 00:1f:ce:00:00:1c, ethertype IPv4 (0x0800), length 54: 46.29.161.6.6961 > 118.112.184.102.49996: Flags [R.], seq 0, ack 1181678155, win 0, length 0
ea:37:72:c2:15:c3 > 00:1f:ce:00:00:1c, ethertype IPv4 (0x0800), length 54: 46.29.161.6.6961 > 112.49.107.42.6669: Flags [R.], seq 0, ack 990172527, win 0, length 0
ea:37:72:c2:15:c3 > 00:1f:ce:00:00:1c, ethertype IPv4 (0x0800), length 54: 46.29.161.6.6961 > 59.148.76.229.3727: Flags [R.], seq 0, ack 1923696257, win 0, length 0
ea:37:72:c2:15:c3 > 00:1f:ce:00:00:1c, ethertype IPv4 (0x0800), length 54: 46.29.161.6.6961 > 223.93.191.238.54927: Flags [R.], seq 0, ack 1116817382, win 0, length 0
ea:37:72:c2:15:c3 > 00:1f:ce:00:00:1c, ethertype IPv4 (0x0800), length 54: 46.29.161.6.6961 > 39.129.166.173.32833: Flags [R.], seq 0, ack 3813951025, win 0, length 0
ea:37:72:c2:15:c3 > 00:1f:ce:00:00:1c, ethertype IPv4 (0x0800), length 54: 46.29.161.6.6961 > 112.21.206.189.10918: Flags [R.], seq 0, ack 1309987123, win 0, length 0
ea:37:72:c2:15:c3 > 00:1f:ce:00:00:1c, ethertype IPv4 (0x0800), length 54: 46.29.161.6.6961 > 180.107.237.236.16834: Flags [R.], seq 0, ack 3225591478, win 0, length 0
ea:37:72:c2:15:c3 > 00:1f:ce:00:00:1c, ethertype IPv4 (0x0800), length 54: 46.29.161.6.6961 > 78.163.170.202.46424: Flags [R.], seq 0, ack 4237280895, win 0, length 0
ea:37:72:c2:15:c3 > 00:1f:ce:00:00:1c, ethertype IPv4 (0x0800), length 54: 46.29.161.6.6961 > 14.10.98.129.51010: Flags [R.], seq 0, ack 2553403103, win 0, length 0
ea:37:72:c2:15:c3 > 00:1f:ce:00:00:1c, ethertype IPv4 (0x0800), length 54: 46.29.161.6.6961 > 180.105.97.221.24897: Flags [R.], seq 0, ack 1306532100, win 0, length 0
ea:37:72:c2:15:c3 > 00:1f:ce:00:00:1c, ethertype IPv4 (0x0800), length 54: 46.29.161.6.6961 > 113.249.165.116.28169: Flags [R.], seq 0, ack 683232306, win 0, length 0
ea:37:72:c2:15:c3 > 00:1f:ce:00:00:1c, ethertype IPv4 (0x0800), length 54: 46.29.161.6.6961 > 119.117.152.102.16109: Flags [R.], seq 0, ack 1473050767, win 0, length 0
ea:37:72:c2:15:c3 > 00:1f:ce:00:00:1c, ethertype IPv4 (0x0800), length 54: 46.29.161.6.6961 > 42.224.185.197.13918: Flags [R.], seq 0, ack 2265870740, win 0, length 0
ea:37:72:c2:15:c3 > 00:1f:ce:00:00:1c, ethertype IPv4 (0x0800), length 54: 46.29.161.6.6961 > 60.246.36.122.16349: Flags [R.], seq 0, ack 461522938, win 0, length 0
ea:37:72:c2:15:c3 > 00:1f:ce:00:00:1c, ethertype IPv4 (0x0800), length 54: 46.29.161.6.6961 > 121.239.56.68.60339: Flags [R.], seq 0, ack 2827223350, win 0, length 0
ea:37:72:c2:15:c3 > 00:1f:ce:00:00:1c, ethertype IPv4 (0x0800), length 54: 46.29.161.6.6961 > 112.195.133.15.45427: Flags [R.], seq 0, ack 4047631036, win 0, length 0
ea:37:72:c2:15:c3 > 00:1f:ce:00:00:1c, ethertype IPv4 (0x0800), length 54: 46.29.161.6.6961 > 114.100.47.232.53907: Flags [R.], seq 0, ack 1665628791, win 0, length 0
ea:37:72:c2:15:c3 > 00:1f:ce:00:00:1c, ethertype IPv4 (0x0800), length 54: 46.29.161.6.8080 > 157.49.105.130.49323: Flags [R.], seq 0, ack 422270617, win 0, length 0
ea:37:72:c2:15:c3 > 00:1f:ce:00:00:1c, ethertype IPv4 (0x0800), length 54: 46.29.161.6.6961 > 150.203.66.1.61694: Flags [R.], seq 0, ack 2006289295, win 0, length 0
ea:37:72:c2:15:c3 > 00:1f:ce:00:00:1c, ethertype IPv4 (0x0800), length 54: 46.29.161.6.6961 > 118.46.213.90.59739: Flags [R.], seq 0, ack 1624059636, win 0, length 0
ea:37:72:c2:15:c3 > 00:1f:ce:00:00:1c, ethertype IPv4 (0x0800), length 54: 46.29.161.6.6961 > 120.84.12.90.45073: Flags [R.], seq 0, ack 258512235, win 0, length 0
ea:37:72:c2:15:c3 > 00:1f:ce:00:00:1c, ethertype IPv4 (0x0800), length 54: 46.29.161.6.6961 > 223.19.213.254.1348: Flags [R.], seq 0, ack 1975231674, win 0, length 0

可以看看指向端口是不是80
如果是你对外攻击，你会产生一大堆随机端口指向一个目标为固定端口的ip
如果是你被攻击，那么会有一大堆ip随机端口指向你的80端口，比如如果显示为自己服务器ip的80端口这很明显是误报。。。你不可能从80端口把数据发给其他人


直接让AI写一份证明
以下是一份证明的样本，可以用来说明你的服务器近期被硬件防火墙误报攻击：

---

尊敬的网络安全团队，

我是 [你的名字]，负责管理 [你的服务器名称]，即 [IP 地址]。最近我们收到硬件防火墙的警告，提示可能存在对外攻击行为，具体信息如下：

事件名称 : FL00D-tcp.1-eno1 detected
触发时间 : [具体时间]
硬件防火墙警告 : VPS is limited. Metric: 350257

根据硬件防火墙的日志，警告显示多条连接信息，特征如下:

服务器IP发起到固定IP和端口的连接：
- 服务器IP:80 > 172.69.195.166:20826
- 服务器IP:80 > 172.68.130.143:62846
- 服务器IP:80 > 141.101.104.68:47310
- 服务器IP:80 > 108.162.221.18:10778
- 服务器IP:80 > 162.158.210.163:15272
- 服务器IP:80 > 172.71.182.63:47138

...

我们对上述行为进行了深入分析，结论如下：

1. **服务器未进行对外攻击**：如果服务器进行了对外攻击，会表现为大量随机端口指向某一个固定端口的IP。然而日志显示的情况并不符合此特征，相反，多数连接均为服务器IP的80端口与多个外部IP之间的通信。

2. **服务器可能受到外部攻击**：多条连接显示了外部多个IP的随机端口指向服务器的80端口，这更符合受到外部攻击（如DDoS攻击）的特征。

3. **误报可能性**：上述表现极有可能是防火墙的误报。在防火墙检测到的连接中，并没有典型的对外攻击特征。实际数据传输行为说明，这些更多是正常的HTTP请求响应。

4.**使用Cloudflare**：我们服务器当前正在使用Cloudflare作为CDN（内容分发网络），因此，所有访问IP均来自Cloudflare的IP池（https://www.cloudflare.com/zh-cn/ips/）。这些IP地址都是Cloudflare分配的，并不是任何异常的ip地址。


基于以上分析，我们认为目前的警告属于误报。请求网络安全团队重新评估此次警告，并尽快解除对服务器的限制，以便恢复正常的业务运行。

非常感谢贵团队对网络安全的持续关注。如需要更多信息或进一步的配合，欢迎随时联系。

祝好，

[你的名字]  
[联系信息]  
[日期]

---

你可以根据具体情况和需要，修改此证明内容。希望对你有帮助。


VPS is limited. Metric: 359312
是不是限制35W连接数？