centos cannot ping external network

First check whether the added DNS is normal. If it does not exist, add the following dns:

[root@cgls]# vim /etc/resolv.conf
nameserver 114.114.114.114
nameserver 8.8.8.8

If this still does not work, you can try to add routing: (You need to add it according to your own network Segment settings)

[root@cgls]# route add default gw 192.168.11.1

Under normal circumstances, you can ping successfully at this time:

[root@cgls]# ping www.baidu.com

Recommended related tutorials: centos tutorial

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