我有一个带有 debian 5.0 的 sheevaplug。直到今天为止，互联网一直运行良好。我有一堆电脑通过无线连接到我的路由器，并且互联网工作正常。从今天开始，我的 Debian 无法连接到互联网，我不知道为什么......当我运行时，ping google.com我得到这个：
ping google.com
PING google.com (173.194.35.8) 56(84) bytes of data.
^C
--- google.com ping statistics ---
443 packets transmitted, 0 received, 100% packet loss, time 442006ms
永远这样，我什么也得不到。以下是一些可能有用的信息：内容/etc/network/interfaces：
# Used by ifup(8) and ifdown(8). See the interfaces(5) manpage or
# /usr/share/doc/ifupdown/examples for more information.
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet dhcp
输出ifconfig：
eth0 Link encap:Ethernet HWaddr f0:ad:4e:01:40:78
inet addr:192.168.2.12 Bcast:192.168.2.255 Mask:255.255.255.0
inet6 addr: fe80::f2ad:4eff:fe01:4078/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2200 errors:0 dropped:0 overruns:0 frame:0
TX packets:2926 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:229615 (224.2 KiB) TX bytes:466378 (455.4 KiB)
Interrupt:11
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
内容/etc/resolv.conf：
nameserver 192.168.2.1
这是输出netstat -rn：
debian:~# netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
0.0.0.0 192.168.2.1 0.0.0.0 UG 0 0 0 eth0
输出arp -na：
debian:~# arp -na
? (192.168.2.1) at 00:1a:2a:27:c0:68 [ether] on eth0
输出route：
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.2.0 * 255.255.255.0 U 0 0 0 eth0
default . 0.0.0.0 UG 0 0 0 eth0
我尝试了所有方法：静态 IP、重新启动网络连接、重新启动路由器，但都没有成功... 有什么想法可能出在哪里吗？
编辑：这是输出route：
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.2.0 * 255.255.255.0 U 0 0 0 eth0
default . 0.0.0.0 UG 0 0 0 eth0
编辑：这是输出netstat -rn：
debian:~# netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
0.0.0.0 192.168.2.1 0.0.0.0 UG 0 0 0 eth0
和arp -na：
debian:~# arp -na
? (192.168.2.1) at 00:1a:2a:27:c0:68 [ether] on eth0