我的上网本在我的本地网络上有一个相当奇怪的问题。当尝试从远程系统以任何方式连接到它时，它似乎没有找到它。但是，如果我让上网本 ping 尝试连接的机器，它似乎可以正常工作。
下面是从我的主 PC 到上网本的 ping 测试。
C:\Users\Sam>ping 192.168.8.102
Pinging 192.168.8.102 with 32 bytes of data:
Reply from 192.168.8.100: Destination host unreachable.
Reply from 192.168.8.100: Destination host unreachable.
Reply from 192.168.8.100: Destination host unreachable.
Reply from 192.168.8.100: Destination host unreachable.
Ping statistics for 192.168.8.102:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
现在从上网本 ping 我的主 PC
sam@malamute ~ $ ping 192.168.8.100
PING 192.168.8.100 (192.168.8.100) 56(84) bytes of data.
64 bytes from 192.168.8.100: icmp_req=1 ttl=128 time=2.46 ms
64 bytes from 192.168.8.100: icmp_req=2 ttl=128 time=0.835 ms
64 bytes from 192.168.8.100: icmp_req=3 ttl=128 time=1.60 ms
64 bytes from 192.168.8.100: icmp_req=4 ttl=128 time=1.32 ms
64 bytes from 192.168.8.100: icmp_req=5 ttl=128 time=1.34 ms
^C
--- 192.168.8.100 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4004ms
rtt min/avg/max/mdev = 0.835/1.514/2.460/0.536 ms
在上网本与主 PC 建立连接后，再次从主 PC 发出相同的 ping
C:\Users\Sam>ping 192.168.8.102
Pinging 192.168.8.102 with 32 bytes of data:
Reply from 192.168.8.102: bytes=32 time=1ms TTL=64
Reply from 192.168.8.102: bytes=32 time=1ms TTL=64
Reply from 192.168.8.102: bytes=32 time=1ms TTL=64
Reply from 192.168.8.102: bytes=32 time=1ms TTL=64
Ping statistics for 192.168.8.102:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 1ms, Maximum = 1ms, Average = 1ms
上网本正在运行 Gentoo，目前通过无线连接。
我的主 PC 运行的是 Windows 7，但是无论我在此网络上使用哪台 PC，我都会得到相同的结果。请从同一网络上的 CentOS 机器上查看此示例
[root@tiger ~]# ping 192.168.8.102
PING 192.168.8.102 (192.168.8.102) 56(84) bytes of data.
From 192.168.8.200 icmp_seq=2 Destination Host Unreachable
From 192.168.8.200 icmp_seq=3 Destination Host Unreachable
From 192.168.8.200 icmp_seq=4 Destination Host Unreachable
--- 192.168.8.102 ping statistics ---
6 packets transmitted, 0 received, +3 errors, 100% packet loss, time 5000ms
, pipe 3
如果您需要更多信息或需要日志或配置文件，请告诉我，我们将不胜感激。
附加信息：
来自上网本的 TCP 转储没有响应。
从 USB 密钥启动到 Ubuntu 时，结果相同。
使用有线以太网连接时没有问题。