帮忙看一下 Edx 的登录页面能不能打开 https://courses.edx.org/login

[Davy]

我是上海电信的光纤上网，Edx的登录页面 https://courses.edx.org/login 始终打不开，应该不是被墙了，请问在其他地方能打开吗，谢谢。

[965380535]

湖北移动能打开 没有问题

[loveminds]

广州电信 广州移动 正常

[Davy]

@0okmnbvcxzx @vimpreal @965380535 @loveminds 谢谢各位，我给电信打了电话投诉，然后又给Edx发了issue。电信的小哥上门查了traceroute，Edx也给了回复。不知道是哪个起了作用，但打开网页的速度比以前快了，而且也能登录了，还是会哭的孩子有奶吃啊。

[0okmnbvcxzx]

@Davy 这都可以。。。可以发下现在traceroute和高峰时期ping github的记录我看下吗？谢谢。

[Davy]

@0okmnbvcxzx
我用的是上海电信10M，晚上7点半，应该是繁忙时段吧。
先traceroute
$ traceroute -m 100 www.github.com
traceroute to www.github.com (192.30.252.131), 100 hops max, 60 byte packets
1 192.168.1.1 (192.168.1.1) 0.512 ms 0.644 ms 0.714 ms
2 * * *
3 124.74.226.241 (124.74.226.241) 2.251 ms 2.373 ms 2.395 ms
4 124.74.209.165 (124.74.209.165) 7.092 ms 7.142 ms 7.174 ms
5 202.101.63.214 (202.101.63.214) 4.894 ms 4.971 ms 4.996 ms
6 202.97.33.10 (202.97.33.10) 4.594 ms 6.526 ms 2.591 ms
7 * * *
8 202.97.58.174 (202.97.58.174) 257.765 ms * *
9 * 202.97.49.154 (202.97.49.154) 251.936 ms 267.869 ms
10 * * *
11 ae-3-80.edge3.Washington4.Level3.net (4.69.149.146) 451.971 ms * 207.88.14.212.ptr.us.xo.net (207.88.14.212) 397.285 ms
12 207.88.12.131.ptr.us.xo.net (207.88.12.131) 326.461 ms 309.612 ms *
13 te-4-1-0.rar3.atlanta-ga.us.xo.net (207.88.12.129) 335.822 ms * *
14 * 207.88.12.132.ptr.us.xo.net (207.88.12.132) 336.817 ms 343.076 ms

之后都是* * *，不知道为什么，所以又用tcptraceroute,
$ sudo tcptraceroute -m 100 www.github.com
traceroute to www.github.com (192.30.252.131), 100 hops max, 60 byte packets
1 192.168.1.1 (192.168.1.1) 0.405 ms 0.542 ms *
2 * * *
3 * * *
4 * * *
5 * * *
6 * 202.97.33.10 (202.97.33.10) 2.957 ms 2.786 ms
7 * * *
8 * * *
9 * * *
10 * * *
11 * * ae-2-70.edge3.Washington4.Level3.net (4.69.149.82) 440.343 ms
12 207.88.12.131.ptr.us.xo.net (207.88.12.131) 333.106 ms 338.148 ms ae-1-60.edge3.Washington4.Level3.net (4.69.149.18) 439.816 ms
13 te-4-1-0.rar3.atlanta-ga.us.xo.net (207.88.12.129) 333.039 ms 333.339 ms GITHUB-INC.edge3.Washington4.Level3.net (4.53.116.102) 348.439 ms
14 192.30.252.203 (192.30.252.203) 385.253 ms 207.88.12.132.ptr.us.xo.net (207.88.12.132) 339.694 ms 192.30.252.203 (192.30.252.203) 385.249 ms
15 github.com (192.30.252.131) <syn,ack> 368.468 ms 335.399 ms 337.600 ms

最后是ping
$ ping www.github.com
PING github.com (192.30.252.129) 56(84) bytes of data.
64 bytes from github.com (192.30.252.129): icmp_req=1 ttl=49 time=313 ms
64 bytes from github.com (192.30.252.129): icmp_req=5 ttl=49 time=313 ms
64 bytes from github.com (192.30.252.129): icmp_req=6 ttl=49 time=313 ms
64 bytes from github.com (192.30.252.129): icmp_req=8 ttl=49 time=312 ms
64 bytes from github.com (192.30.252.129): icmp_req=9 ttl=49 time=313 ms
64 bytes from github.com (192.30.252.129): icmp_req=10 ttl=49 time=312 ms
64 bytes from github.com (192.30.252.129): icmp_req=11 ttl=49 time=313 ms
64 bytes from github.com (192.30.252.129): icmp_req=13 ttl=49 time=313 ms
^C
--- github.com ping statistics ---
15 packets transmitted, 8 received, 46% packet loss, time 14055ms
rtt min/avg/max/mdev = 312.694/313.293/313.751/0.355 ms

[0okmnbvcxzx]

@Davy 我什么都没做好像都和你这差不多呢Orz.....中间路由跟你差不多，最近的丢包率好像是从80%降到50%左右了，没之前那么糟，虽然也不怎么样，这是刚ping的结果

Ping statistics for 192.30.252.131:
Packets: Sent = 40, Received = 22, Lost = 18 (45% loss),
Approximate round trip times in milli-seconds:
Minimum = 325ms, Maximum = 453ms, Average = 347ms

[Davy]

@0okmnbvcxzx 我猜Edx做了优化。