本文纯属个人技术分析，不代表学校立场
近期收到许多校园网用户反馈无法正常游玩绝区零、明日方舟、无限暖暖等游戏，甚至部分网站如CSDN也无法访问，特写此篇文章进行问题分析并提供临时解决方案。
分析各大游戏的连接性
通过监听DNS服务器，得到了无法访问的游戏的相关接口地址
| 游戏 | 地址 | 解析地址 |
|---|---|---|
| 绝区零 | nap-sdk.mihoyo.com | 203.107.60.40 |
| 无限暖暖 | risk-api.papegames.com | dcyy2b4rk72k086e.aliyunddos1015.com [203.107.60.165] |
| 明日方舟 | web-api.hypergryph.com | f0s5d78vt9712zto.aliyunddos1005.com [203.107.60.124] |
怎么都是同一个网段的?
毫无意外，ping不通。只能先追踪一下链路了
C:\Users\wuyex>tracert nap-sdk.mihoyo.com
Tracing route to nap-sdk.mihoyo.com [203.107.60.40]
over a maximum of 30 hops:
1 3 ms 3 ms 3 ms 202.194.0.17
2 7 ms 3 ms 3 ms 202.194.0.18
3 * * * Request timed out.
4 6 ms 4 ms 9 ms 58.194.164.77
5 9 ms * * 58.194.164.114
6 10 ms 6 ms 3 ms 101.4.116.37
7 22 ms 22 ms 21 ms 101.4.117.29
8 * * * Request timed out.
9 27 ms 27 ms 36 ms 101.4.117.46
10 30 ms 27 ms 31 ms 219.224.102.218
11 31 ms 26 ms 26 ms 121.0.31.145
12 * * * Request timed out.
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
17 * * * Request timed out.
18 * * * Request timed out.
19 * * * Request timed out.
20 * * * Request timed out.
21 * * * Request timed out.
22 * * * Request timed out.
23 * * * Request timed out.
24 * * * Request timed out.
25 * * * Request timed out.
26 * * * Request timed out.
27 * * * Request timed out.
28 * * * Request timed out.
29 * * * Request timed out.
30 * * * Request timed out.
Trace complete.C:\Users\wuyex>tracert risk-api.papegames.com
Tracing route to dcyy2b4rk72k086e.aliyunddos1015.com [203.107.60.165]
over a maximum of 30 hops:
1 3 ms 3 ms 3 ms 202.194.0.17
2 5 ms 3 ms 3 ms 202.194.0.18
3 * 4 ms 3 ms 202.194.0.81
4 7 ms 3 ms 3 ms 58.194.164.77
5 * * 3 ms 58.194.164.114
6 8 ms 4 ms 4 ms 101.4.116.37
7 41 ms 22 ms 22 ms 101.4.117.29
8 * 28 ms 23 ms 101.4.118.249
9 26 ms 26 ms 26 ms 101.4.117.46
10 30 ms 27 ms 26 ms 219.224.102.218
11 30 ms 26 ms 27 ms 121.0.31.145
12 * * * Request timed out.
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
17 * * * Request timed out.
18 * * * Request timed out.
19 * * * Request timed out.
20 * * * Request timed out.
21 * * * Request timed out.
22 * * * Request timed out.
23 * * * Request timed out.
24 * * * Request timed out.
25 * * * Request timed out.
26 * * * Request timed out.
27 * * * Request timed out.
28 * * * Request timed out.
29 * * * Request timed out.
30 * * * Request timed out.
Trace complete.C:\Users\wuyex>tracert web-api.hypergryph.com
Tracing route to f0s5d78vt9712zto.aliyunddos1005.com [203.107.60.124]
over a maximum of 30 hops:
1 4 ms 3 ms * 202.194.0.17
2 4 ms 4 ms 3 ms 202.194.0.18
3 * 3 ms * 202.194.0.81
4 3 ms 2 ms 3 ms 58.194.164.77
5 * * * Request timed out.
6 8 ms * 8 ms 101.4.116.37
7 22 ms 22 ms 22 ms 101.4.117.29
8 * 26 ms 23 ms 101.4.118.249
9 30 ms 26 ms 26 ms 101.4.117.46
10 27 ms 26 ms 27 ms 219.224.102.218
11 63 ms 27 ms 46 ms 101.4.131.18
12 * * * Request timed out.
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
17 * * * Request timed out.
18 * * * Request timed out.
19 * * * Request timed out.
20 * * * Request timed out.
21 * * * Request timed out.
22 * * * Request timed out.
23 * * * Request timed out.
24 * * * Request timed out.
25 * * * Request timed out.
26 * * * Request timed out.
27 * * * Request timed out.
28 * * * Request timed out.
29 * * * Request timed out.
30 * * * Request timed out.
Trace complete.连接死在了 121.0.31.145 和 101.4.131.18 这些IP上，这些IP到底是何方神圣
查看一下归属地：中国 浙江 杭州 阿里巴巴(中国)网络技术有限公司 / 浙江省/杭州市/中国教育网
可以看出来大概率不是山大校园网的锅，更像是阿里云把山大给屏蔽了
解决方案
既然是阿里云把尼山屏蔽了，那解决方法就简单了。解决方法有二：
- 开一个代理这样就不是用山大的IP去连接阿里云了
- 更换校园网出口
方法一懂得都懂，但是搞一个代理不太实用，凭空增加延迟。这里主要讲一下方法二：
通过观察得知，阿里云只屏蔽了山大主要的教育网的出口，于是我们通过数智化支撑研究院提供的切换出口工具即可绕过阿里云的屏蔽。
换出口工具：https://10.1.2.224/sdu-net-mgt/
这里换一个不是很繁忙的非教育网出口，点击更换链路就好了。
PS C:\Users\wuyex> ping nap-sdk.mihoyo.com
Pinging nap-sdk.mihoyo.com [203.107.60.40] with 32 bytes of data:
Reply from 203.107.60.40: bytes=32 time=19ms TTL=51
Reply from 203.107.60.40: bytes=32 time=22ms TTL=51
Reply from 203.107.60.40: bytes=32 time=22ms TTL=51
Reply from 203.107.60.40: bytes=32 time=22ms TTL=51
Ping statistics for 203.107.60.40:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 19ms, Maximum = 22ms, Average = 21ms问题解决！
不过这样毕竟不是长久之计，最好是能通过游戏服务商联系阿里解决这个问题。