几天后我无法再访问某个网站：Assist.zoho.com（或者协助.zoho.eu）。
这里的输出traceroute：
$ traceroute -I assist.zoho.com
traceroute to assist.zoho.com (136.143.191.95), 30 hops max, 60 byte packets
1 fritz.box (192.168.1.1) 1.807 ms 1.799 ms 1.797 ms
2 host5-41-98-79.dynamic.ehiweb.it (79.98.41.5) 9.216 ms 9.214 ms 9.213 ms
3 host224-41-98-79.dynamic.ehiweb.it (79.98.41.224) 9.211 ms 9.209 ms 9.207 ms
4 10-229-157-185.fibertelecom.it (185.157.229.10) 13.174 ms 13.173 ms 13.172 ms
5 81-228-157-185.fibertelecom.it (185.157.228.81) 13.169 ms 13.168 ms 13.166 ms
6 * * *
7 ae3.cs1.cdg11.fr.zip.zayo.com (64.125.27.14) 165.465 ms 165.428 ms 165.420 ms
8 ae0.cs1.cdg12.fr.eth.zayo.com (64.125.29.84) 165.416 ms 165.414 ms 165.411 ms
9 * * *
10 * * *
11 * * ae3.cs3.ord2.us.eth.zayo.com (64.125.29.209) 166.201 ms
12 ae2.cs1.sea1.us.eth.zayo.com (64.125.29.26) 164.873 ms 164.870 ms 164.868 ms
13 ae28.mpr2.sea1.us.zip.zayo.com (64.125.29.103) 164.864 ms 164.410 ms 164.403 ms
14 64.124.135.82.idia-291213-003-zyo.zip.zayo.com (64.124.135.82) 167.050 ms 167.048 ms 167.873 ms
15 204.141.42.14 (204.141.42.14) 176.735 ms 176.727 ms 174.087 ms
16 * * *
17 * * *
18 * * *
19 * * *
20 * * *
21 * * *
22 * * *
23 * * *
24 * * *
25 * * *
26 * * *
27 * * *
28 * * *
29 * * *
30 * * *
和：
$ traceroute -I assist.zoho.eu
traceroute to assist.zoho.eu (213.244.146.83), 30 hops max, 60 byte packets
1 fritz.box (192.168.1.1) 1.674 ms 1.666 ms 1.664 ms
2 host5-41-98-79.dynamic.ehiweb.it (79.98.41.5) 9.285 ms 9.285 ms 9.283 ms
3 host224-41-98-79.dynamic.ehiweb.it (79.98.41.224) 9.281 ms 9.280 ms 9.278 ms
4 10-229-157-185.fibertelecom.it (185.157.229.10) 30.519 ms 30.519 ms 31.318 ms
5 4-1-6-101.bear1.milan2.level3.net (213.249.105.25) 10.125 ms 10.124 ms 10.123 ms
6 ae2-3220.msr3.frankfurt1.level3.net (4.69.167.66) 18.367 ms 18.710 ms 18.704 ms
7 * * *
8 * * *
9 * * *
10 * * *
11 * * *
12 * * *
13 * * *
14 * * *
15 * * *
16 * * *
17 * * *
18 * * *
19 * * *
20 * * *
21 * * *
22 * * *
23 * * *
24 * * *
25 * * *
26 * * *
27 * * *
28 * * *
29 * * *
30 * * *
这不是关于 DNS 的问题，因为它已解决，并且使用 IP 运行上述测试会产生相同的输出。顺便说一句，服务器不会响应 ping 请求。
那就是说，有什么我可以做的吗？