Linux-Centos 7 网络NAT连接模式不能上网问题排查

最新推荐文章于 2024-11-23 11:30:35 发布

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最新推荐文章于 2024-11-23 11:30:35 发布 · 1.7k 阅读

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#linux #centos

Linux-Centos 7 网络NAT连接模式不能上网问题排查

首先启动centos系统后，检查ping www.baidu.com 无法解析，后转root用户
[normal4@localhost ~]$ ping www.baidu.com
ping: www.baidu.com: 未知的名称或服务
[normal4@localhost ~]$ su -
密码：
上一次登录：三 6月 17 09:16:40 CST 2020pts/0 上
[root@localhost ~]# whoami
root
[root@localhost ~]#

1、检查网卡信息！！！

[root@localhost ~]# ifconfig
    lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
            inet 127.0.0.1  netmask 255.0.0.0
            inet6 ::1  prefixlen 128  scopeid 0x10<host>
            loop  txqueuelen 1000  (Local Loopback)
            RX packets 2631  bytes 1059258 (1.0 MiB)
            RX errors 0  dropped 0  overruns 0  frame 0
            TX packets 2631  bytes 1059258 (1.0 MiB)
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
     
    irbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
            inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255
            ether 52:54:00:7d:79:7c  txqueuelen 1000  (Ethernet)
            RX packets 0  bytes 0 (0.0 B)
            RX errors 0  dropped 0  overruns 0  frame 0 
            TX packets 0  bytes 0 (0.0 B)
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
[root@localhost ~]# ifconfig -a
    ens33: flags=4098<BROADCAST,MULTICAST>  mtu 1500
            ether 00:0c:29:e4:67:a0  txqueuelen 1000  (Ethernet)
            RX packets 0  bytes 0 (</