我的笔记本电脑安装了qemu-kvm，我希望我的来宾系统可以ping google，因此我想将来宾桥接到主机的无线适配器。我尝试了（> _ <），但失败了。 我的系统是debain_amd64，访客是ubuntu_server_amd64。
我的网络状态
host# ip a
1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp109s0f1: mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
link/ether 80:fa:5b:48:15:df brd ff:ff:ff:ff:ff:ff
3: wlp110s0: mtu 1500 qdisc mq state UP group default qlen 1000
link/ether 88:b1:11:22:c7:c0 brd ff:ff:ff:ff:ff:ff
inet 10.242.101.213/17 brd 10.242.127.255 scope global dynamic noprefixroute wlp110s0
valid_lft 27145sec preferred_lft 27145sec
inet6 2001:250:3007:2:7056:9b16:afa5:aa8d/64 scope global dynamic noprefixroute
valid_lft 2592000sec preferred_lft 604800sec
inet6 fe80::89ec:15e6:aa6f:6ffa/64 scope link noprefixroute
valid_lft forever preferred_lft forever
host# ip route
default via 10.242.0.1 dev wlp110s0 proto dhcp metric 600
10.242.0.0/17 dev wlp110s0 proto kernel scope link src 10.242.101.213 metric 600
169.254.0.0/16 dev wlp110s0 scope link metric 1000
host# cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 10.10.232.34
nameserver 202.116.32.254
guest# ip a
1: lo: mtu 65536 qdisc noqueue state UNKNOWN group defaul
t qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens3: mtu 1500 qdisc fq_codel state UP grou
p default qlen 1000
link/ether 52:54:00:12:34:56 brd ff:ff:ff:ff:ff:ff
inet 10.0.2.15/24 brd 10.0.2.255 scope global dynamic ens3
valid_lft 86385sec preferred_lft 86385sec
inet6 fec0::5054:ff:fe12:3456/64 scope site dynamic mngtmpaddr noprefixroute
valid_lft 86387sec preferred_lft 14387sec
inet6 fe80::5054:ff:fe12:3456/64 scope link
valid_lft forever preferred_lft forever
我尝试过
sudo iw dev wlp110s0 set 4addr on
sudo ip link set wlp110s0 down
sudo ip link set wlp110s0 up promisc on
sudo ip link add name br0 type bridge
sudo ip addr add 10.242.101.213/17 dev br0
sudo ip link set br0 up
sudo dnsmasq --interface=br0 --bind-interfaces --dhcp-range=10.242.101.1,10.242.101.255
sudo modprobe tun
sudo ip tuntap add dev tap0 mode tap user xxx
sudo ip link set tap0 up promisc on
sudo ip link set tap0 master br0
qemu-system-x86_64 ~/VM/UnbuntuServer_amd64.img -enable-kvm -m 2048 -net nic,model=virtio -net tap,ifname=tap0,script=no
期望结果
host# ping 10.242.101.144 #guest ok
guest# ping 10.242.101.213 #host ok
guest# ping www.google.com #ethernet ok
others# ping 10.242.101.213 #host ok
但是
host# ping 10.242.101.144 #guest ok
guest# ping 10.242.101.213 #host ok
guest# ping www.google.com #ethernet failed
others# ping 10.242.101.213 #host failed