centos下访问不了外网怎么办

# 在 Centos 上先执行删除旧的网卡信息

/sbin/arp -d 192.168.1.1

# 重新设置新的，上面win里面找到的 网卡，横线改为冒号

/sbin/arp -s 192.168.1.1 00:17:16:08:33:6a

[root@localhost ~]# ping www.baidu.com

PING www.a.shifen.com (183.232.231.172) 56(84) bytes of data.

64 bytes from 183.232.231.172: icmp_seq=1 ttl=55 time=9.03 ms

64 bytes from 183.232.231.172: icmp_seq=2 ttl=55 time=8.80 ms

64 bytes from 183.232.231.172: icmp_seq=3 ttl=55 time=10.1 ms

64 bytes from 183.232.231.172: icmp_seq=4 ttl=55 time=108 ms

^C

--- www.a.shifen.com ping statistics ---

4 packets transmitted, 4 received, 0% packet loss, time 3814ms

rtt min/avg/max/mdev = 8.804/34.058/108.239/42.831 ms

You have new mail in /var/spool/mail/root

[root@localhost ~]#