1. 查看本机的网关和DNS
2. 给虚拟机配置网关和DNS
# ifcfg-ens33 替换成你自己的，也是在这个路径下，基本上是你的网卡名
# 添加网关和DNS
[root@master ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens33
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=none
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=default
NAME=ens33
UUID=1956fb07-4a30-45ae-aa92-1f509aaeea35
DEVICE=ens33
ONBOOT=yes
IPADDR=192.168.31.200
PREFIX=24
GATEWAY=192.168.31.1 # 网关
DNS1=192.168.31.1 # DNS地址
# 重启网络服务
[root@master ~]# systemctl restart NetworkManager
# 查看网关
[root@master ~]# ip route
default via 192.168.31.1 dev ens33 proto static metric 100
192.168.31.0/24 dev ens33 proto kernel scope link src 192.168.31.200 metric 100
#查看DNS
[root@master ~]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.31.1 0.0.0.0 UG 100 0 0 ens33
192.168.31.0 0.0.0.0 255.255.255.0 U 100 0 0 ens33
3. 测试
[root@master ~]# ping -c4 taobao.com
PING taobao.com (59.82.43.239) 56(84) bytes of data.
64 bytes from 59.82.43.239 (59.82.43.239): icmp_seq=1 ttl=88 time=47.4 ms
64 bytes from 59.82.43.239 (59.82.43.239): icmp_seq=2 ttl=88 time=45.7 ms
64 bytes from 59.82.43.239 (59.82.43.239): icmp_seq=3 ttl=88 time=28.7 ms
64 bytes from 59.82.43.239 (59.82.43.239): icmp_seq=4 ttl=88 time=37.9 ms
--- taobao.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3006ms
rtt min/avg/max/mdev = 28.680/39.917/47.414/7.405 ms