在我的 Windows 10（版本 20H2）桌面上，我收到一个特定网站（protectcovers.com）的“无法访问此网站错误”。奇怪的是，本周早些时候我能够连接（甚至下了订单）。
isitdownrightnow.com 报告该网站已启动。
我可以 ping 通该网站：
C:\Users\Clayton>ping www.protectcovers.com
Pinging levj9m-protectstaging-magweb-do.nodes.hypernode.io [45.55.125.55] with 32 bytes of data:
Reply from 45.55.125.55: bytes=32 time=93ms TTL=46
Reply from 45.55.125.55: bytes=32 time=83ms TTL=46
Reply from 45.55.125.55: bytes=32 time=87ms TTL=46
Reply from 45.55.125.55: bytes=32 time=84ms TTL=46
Ping statistics for 45.55.125.55:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 83ms, Maximum = 93ms, Average = 86ms
我可以 nslookup 该网站：
C:\Users\Clayton>nslookup www.protectcovers.com
Server: one.one.one.one
Address: 1.1.1.1
Non-authoritative answer:
Name: levj9m-protectstaging-magweb-do.nodes.hypernode.io
Address: 45.55.125.55
Aliases: www.protectcovers.com
protectstaging.hypernode.io
magweb.protectstaging.hypernode.io
我可以通过我手机的 4G 网络（Verizon）访问该网站。
我尝试了以下方法：
- 使用 Chrome、Brave 和 Edge 浏览器
- 清除所有浏览器中的所有网站数据
- ipconfig /flushdns
- nbtstat -RR
- netsh int ip 重置
- netsh winsock 重置
- 关闭 Windows 防火墙和防病毒软件
- 重新启动并关闭电缆调制解调器（Comcast ISP）
- 运行 Windows 网络诊断
- 验证 windows/system32/drivers/etc/hosts 中没有站点条目
- 多次重启桌面
- 绕过 wifi 路由器（erro）并直接将桌面连接到电缆调制解调器。
显然是网络问题。当我将手机切换到 wifi 时，我无法访问该网站。在我的 Windows 10 笔记本电脑（通过 wifi 连接）上，我无法访问该网站。甚至我台式机上的 Ubuntu VM 也无法访问该网站。
我已经做过 tracert:
C:\Users\Clayton>tracert www.protectcovers.com
Tracing route to levj9m-protectstaging-magweb-do.nodes.hypernode.io [45.55.125.55]
over a maximum of 30 hops:
1 <1 ms <1 ms <1 ms 192.168.4.1
2 10 ms 10 ms 8 ms 96.120.0.145
3 9 ms 9 ms 10 ms po-301-1210-rur02.broadway.nm.albuq.comcast.net [69.139.207.117]
4 10 ms 10 ms 9 ms be-8-ar02.albuquerque.nm.albuq.comcast.net [162.151.130.121]
5 32 ms 33 ms 35 ms be-33654-cr02.losangeles.ca.ibone.comcast.net [68.86.166.65]
6 34 ms 38 ms 33 ms be-1302-cs03.losangeles.ca.ibone.comcast.net [96.110.39.225]
7 32 ms 31 ms 31 ms be-2301-pe01.losangeles.ca.ibone.comcast.net [96.110.44.106]
8 33 ms 33 ms 36 ms 50.242.151.62
9 40 ms 42 ms 39 ms ae-11.r25.lsanca07.us.bb.gin.ntt.net [129.250.2.187]
10 84 ms 77 ms 131 ms ae-5.r25.asbnva02.us.bb.gin.ntt.net [129.250.3.188]
11 87 ms 82 ms 82 ms ae-4.r21.nwrknj03.us.bb.gin.ntt.net [129.250.6.117]
12 82 ms 83 ms 81 ms ae-11.r01.nycmny17.us.bb.gin.ntt.net [129.250.6.97]
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
17 85 ms 85 ms 82 ms 45.55.125.55
Trace complete.
它按预期超时。但是，即使我 tracert 另一个正常打开的网站 (amazon.com)，我也看到超时发生：
C:\Users\Clayton>tracert www.amazon.com
Tracing route to d3ag4hukkh62yn.cloudfront.net [13.225.148.15]
over a maximum of 30 hops:
1 <1 ms <1 ms <1 ms 192.168.4.1
2 13 ms 11 ms 9 ms 96.120.0.145
3 24 ms 11 ms 9 ms po-301-1209-rur01.broadway.nm.albuq.comcast.net [69.139.207.101]
4 11 ms 17 ms 11 ms be-8-ar01.albuquerque.nm.albuq.comcast.net [162.151.130.117]
5 19 ms 21 ms 20 ms be-36811-cs01.1601milehigh.co.ibone.comcast.net [96.110.44.17]
6 17 ms 19 ms 18 ms be-1114-cr14.1601milehigh.co.ibone.comcast.net [96.110.39.114]
7 20 ms 21 ms 18 ms be-301-cr14.champa.co.ibone.comcast.net [96.110.39.1]
8 20 ms 22 ms 20 ms be-1414-cs04.champa.co.ibone.comcast.net [96.110.37.253]
9 20 ms 19 ms 20 ms be-1412-cr12.champa.co.ibone.comcast.net [96.110.37.222]
10 41 ms 42 ms 41 ms be-303-cr11.sunnyvale.ca.ibone.comcast.net [96.110.39.26]
11 47 ms 77 ms 58 ms be-1111-cs01.sunnyvale.ca.ibone.comcast.net [96.110.46.1]
12 40 ms 49 ms 41 ms be-1112-cr12.sunnyvale.ca.ibone.comcast.net [96.110.46.6]
13 42 ms 42 ms 48 ms be-304-cr01.9greatoaks.ca.ibone.comcast.net [96.110.37.182]
14 46 ms 42 ms 41 ms be-11525-cr02.losangeles.ca.ibone.comcast.net [68.86.84.149]
15 57 ms 51 ms 43 ms be-1202-cs02.losangeles.ca.ibone.comcast.net [96.110.39.205]
16 39 ms 59 ms 42 ms be-2202-pe02.losangeles.ca.ibone.comcast.net [96.110.44.118]
17 48 ms 41 ms 40 ms 50.248.118.190
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 42 ms 40 ms 41 ms server-13-225-148-15.lax3.r.cloudfront.net [13.225.148.15]
Trace complete.
我困惑了……