我正在使用 LinuxMint17（主机），并使用 Virtual Box 运行另一个 LinuxMint17 作为客户机。
我的客户 LinuxMint 能够 ping 通主机 LinuxMint，但反之则不行。
VirtualBox 中的网络设置网络适配器 1 - 仅主机网络（我这样做是为了让客户机 IP 与主机保持一致）网络适配器 2 - NAT（为了让我的互联网在客户机上工作）
ifconfig（主机）-
~ $ ifconfig
eth0 Link encap:Ethernet HWaddr 44:8a:5b:42:46:69
UP BROADCAST MULTICAST MTU:1500 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:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:18
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:65536 Metric:1
RX packets:41595 errors:0 dropped:0 overruns:0 frame:0
TX packets:41595 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:14653896 (14.6 MB) TX bytes:14653896 (14.6 MB)
vboxnet0 Link encap:Ethernet HWaddr 0a:00:27:00:00:00
inet addr:192.168.50.1 Bcast:192.168.50.255 Mask:255.255.255.0
inet6 addr: fe80::800:27ff:fe00:0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:508 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:90705 (90.7 KB)
wlan0 Link encap:Ethernet HWaddr 54:27:1e:40:f0:d1
inet addr:192.168.1.72 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::5627:1eff:fe40:f0d1/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:7743461 errors:0 dropped:0 overruns:0 frame:0
TX packets:4638376 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:10989028454 (10.9 GB) TX bytes:411974451 (411.9 MB)
ifconfig（访客）
linuxmint@linuxmint-VirtualBox ~ $ ifconfig
eth0 Link encap:Ethernet HWaddr 08:00:27:97:c5:ee
inet addr:192.168.56.103 Bcast:192.168.56.255 Mask:255.255.255.0
inet6 addr: fe80::a00:27ff:fe97:c5ee/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:4 errors:0 dropped:0 overruns:0 frame:0
TX packets:103 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1723 (1.7 KB) TX bytes:17391 (17.3 KB)
eth1 Link encap:Ethernet HWaddr 08:00:27:06:0f:b3
inet addr:10.0.3.15 Bcast:10.0.3.255 Mask:255.255.255.0
inet6 addr: fe80::a00:27ff:fe06:fb3/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:46 errors:0 dropped:0 overruns:0 frame:0
TX packets:145 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:22668 (22.6 KB) TX bytes:24575 (24.5 KB)
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:65536 Metric:1
RX packets:38 errors:0 dropped:0 overruns:0 frame:0
TX packets:38 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2878 (2.8 KB) TX bytes:2878 (2.8 KB)
Ping 输出 -
主人对客人
~ $ ping 192.168.56.103
PING 192.168.56.103 (192.168.56.103) 56(84) bytes of data.
^C
--- 192.168.56.103 ping statistics ---
5 packets transmitted, 0 received, 100% packet loss, time 3999ms
宾客对主人
linuxmint@linuxmint-VirtualBox ~ $ ping 192.168.50.1
PING 192.168.50.1 (192.168.50.1) 56(84) bytes of data.
64 bytes from 192.168.50.1: icmp_seq=1 ttl=63 time=0.435 ms
64 bytes from 192.168.50.1: icmp_seq=2 ttl=63 time=0.185 ms
^C
--- 192.168.50.1 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 999ms
rtt min/avg/max/mdev = 0.185/0.310/0.435/0.125 ms
linuxmint@linuxmint-VirtualBox ~ $ ping 192.168.1.72
PING 192.168.1.72 (192.168.1.72) 56(84) bytes of data.
64 bytes from 192.168.1.72: icmp_seq=1 ttl=63 time=0.250 ms
64 bytes from 192.168.1.72: icmp_seq=2 ttl=63 time=0.148 ms
^C
--- 192.168.1.72 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 999ms
rtt min/avg/max/mdev = 0.148/0.199/0.250/0.051 ms
有人能指出我做错了什么吗？
答案1
什么设置了客户机上的接口 IP eth0？看起来不对；两个 IP 应该位于同一个子网。
尝试（在客户机上，以 root 身份）：
ip addr del 192.168.56.103/24 dev eth0
ip addr add 192.168.50.2/24 dev eth0
这将删除现有的 IP 地址，并添加位于同一子网的 IP 地址。