尽管 Web 浏览器在同一台计算机上运行，但 Ping 请求超时
Ping request time out although web browser works on same computer
我现在在万维网上，在 Whosebug 上发帖就是证明。但是，如果我尝试从命令行 ping whosebug.com，ping 会超时。我需要做什么才能使 ping 正常工作？
> ping whosebug.com
Pinging whosebug.com [198.252.206.140] with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Ping statistics for 198.252.206.140:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
编辑，试试tracert
> tracert whosebug.com
Tracing route to whosebug.com [198.252.206.140] over a maximum of 30 hops:
1 * * * Request timed out.
2 * * * Request timed out.
3 * * * Request timed out.
4 * * * Request timed out.
5 * * * Request timed out.
6 * * * Request timed out.
7 * * * Request timed out.
8 * * * Request timed out.
9 * * * Request timed out.
10 * * * Request timed out.
11 * * * Request timed out.
12 * * * Request timed out.
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
...
Trace complete.
Request timed out. 一直到 30 跳。
编辑，试试ping google.com
同样的结果。 :-)
有些主机有阻止 ICMP 的防火墙 (http://ca.wikipedia.org/wiki/Internet_Control_Message_Protocol) packets like ping. You can use traceroute (cmd line tool or online webs like http://ping.eu/traceroute/) or tcptraceroute (http://linux.die.net/man/1/tcptraceroute)。
一些路由器还有阻止 ICMP 的防火墙。您可以通过 ping google.com 检测到这一点。它失败了，那么是你的本地路由器有问题，而不是远程主机。
希望对您有所帮助
我现在在万维网上，在 Whosebug 上发帖就是证明。但是，如果我尝试从命令行 ping whosebug.com，ping 会超时。我需要做什么才能使 ping 正常工作？
> ping whosebug.com
Pinging whosebug.com [198.252.206.140] with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Ping statistics for 198.252.206.140:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
编辑，试试tracert
> tracert whosebug.com
Tracing route to whosebug.com [198.252.206.140] over a maximum of 30 hops:
1 * * * Request timed out.
2 * * * Request timed out.
3 * * * Request timed out.
4 * * * Request timed out.
5 * * * Request timed out.
6 * * * Request timed out.
7 * * * Request timed out.
8 * * * Request timed out.
9 * * * Request timed out.
10 * * * Request timed out.
11 * * * Request timed out.
12 * * * Request timed out.
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
...
Trace complete.
Request timed out. 一直到 30 跳。
编辑，试试ping google.com
同样的结果。 :-)
有些主机有阻止 ICMP 的防火墙 (http://ca.wikipedia.org/wiki/Internet_Control_Message_Protocol) packets like ping. You can use traceroute (cmd line tool or online webs like http://ping.eu/traceroute/) or tcptraceroute (http://linux.die.net/man/1/tcptraceroute)。
一些路由器还有阻止 ICMP 的防火墙。您可以通过 ping google.com 检测到这一点。它失败了，那么是你的本地路由器有问题，而不是远程主机。
希望对您有所帮助