我刚刚使用 qemu-kvm 创建了一个虚拟机。主机和来宾都是 Ubuntu 16.04 LTS。但是，客人无法访问互联网。我可以从访客 ping 主机或从主机 ping 访客。这是主机的 ifconfig 的输出
eno1 Link encap:Ethernet HWaddr 6c:0b:84:98:06:a3
inet addr:10.7.202.66 Bcast:10.7.202.255 Mask:255.255.255.0
inet6 addr: fe80::5388:4cd6:d475:94ca/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:41093 errors:0 dropped:0 overruns:0 frame:0
TX packets:100041 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:7514291 (7.5 MB) TX bytes:117854779 (117.8 MB)
Interrupt:20 Memory:f7c00000-f7c20000
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:377404 errors:0 dropped:0 overruns:0 frame:0
TX packets:377404 errors:0 …