根据测试结果看,可能是广东电信到 CDN 节点的 TCP 路由问题。
不过这个调度很奇怪,使用运营商分配 DNS 情况下,广东省还要跨省调度,又不是什么 IDC 资源匮乏的地方
说句题外话,不要用一些奇怪的 CDN,开了大会员看视频,码率增加后,奇怪的 CDN 速度太慢反而导致体验更差了。
root@ubuntuct:~# curl -m 5 -Iv https://static.hdslb.com/js/jquery.min.js
* Trying 117.24.1.239...
* TCP_NODELAY set
* After 2494ms connect time, move on!
* connect to 117.24.1.239 port 443 failed: Connection timed out
* Trying 117.24.1.242...
* TCP_NODELAY set
* After 1246ms connect time, move on!
* connect to 117.24.1.242 port 443 failed: Connection timed out
* Trying 117.24.1.240...
* TCP_NODELAY set
* After 623ms connect time, move on!
* connect to 117.24.1.240 port 443 failed: Connection timed out
* Trying 117.24.1.241...
* TCP_NODELAY set
* After 311ms connect time, move on!
* connect to 117.24.1.241 port 443 failed: Connection timed out
* Trying 117.24.1.238...
* TCP_NODELAY set
* After 155ms connect time, move on!
root@ubuntuct:~# nslookup static.hdslb.com 202.96.134.133
Server: 202.96.134.133
Address: 202.96.134.133#53
Non-authoritative answer:
static.hdslb.com canonical name = static.hdslb.com.w.kunlunhuf.com.
Name: static.hdslb.com.w.kunlunhuf.com
Address: 117.24.1.239
Name: static.hdslb.com.w.kunlunhuf.com
Address: 117.24.1.241
Name: static.hdslb.com.w.kunlunhuf.com
Address: 117.24.1.238
Name: static.hdslb.com.w.kunlunhuf.com
Address: 117.24.1.240
Name: static.hdslb.com.w.kunlunhuf.com
Address: 117.24.1.244
Name: static.hdslb.com.w.kunlunhuf.com
Address: 117.24.1.248
Name: static.hdslb.com.w.kunlunhuf.com
Address: 117.24.1.243
Name: static.hdslb.com.w.kunlunhuf.com
Address: 117.24.1.242
root@ubuntuct:~# mtr -t --report 117.24.1.239
Start: 2020-10-10T13:28:38+0800
HOST: ubuntuweb Loss% Snt Last Avg Best Wrst StDev
1.|-- 192.168.*.1 0.0% 10 0.6 1.0 0.6 1.3 0.2
2.|-- 113.88.*.1 0.0% 10 73.0 13.5 3.4 73.0 21.0
3.|-- 202.105.155.229 0.0% 10 3.9 5.6 3.0 10.3 2.9
4.|-- 183.56.65.78 0.0% 10 2.3 3.1 2.3 3.6 0.5
5.|-- 202.97.65.86 0.0% 10 19.6 18.0 14.4 20.3 1.9
6.|-- 27.152.60.86 0.0% 10 22.6 19.0 17.7 22.6 1.3
7.|-- 125.77.128.177 10.0% 10 66.0 42.0 19.2 66.0 15.6
8.|-- 117.24.0.34 0.0% 10 17.6 17.9 17.6 18.4 0.3
9.|-- 117.24.1.240 0.0% 10 18.5 18.4 17.6 19.0 0.4
root@ubuntuct:~# mtr -t --tcp --port 443 --report 117.24.1.239
Start: 2020-10-10T13:28:12+0800
HOST: ubuntuweb Loss% Snt Last Avg Best Wrst StDev
1.|-- 192.168.*.1 0.0% 10 1.0 1.1 1.0 1.3 0.1
2.|-- 113.88.*.1 0.0% 10 3.3 6.7 3.1 9.3 2.5
3.|-- 61.146.247.133 0.0% 10 2.8 3.4 2.8 3.9 0.4
4.|-- 183.56.65.78 50.0% 10 7121. 2845. 3.5 7121. 2729.0
5.|-- 202.97.66.25 50.0% 10 3066. 2260. 24.9 7154. 3004.0
6.|-- 27.152.60.74 20.0% 10 7149. 1421. 22.7 7149. 2544.6
7.|-- ??? 100.0 10 0.0 0.0 0.0 0.0 0.0
8.|-- 117.24.0.62 30.0% 10 7252. 3074. 18.9 7252. 3068.0
9.|-- 117.24.1.240 30.0% 10 1032. 2065. 19.0 7256. 2459.9
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