The centos server is prohibited from being pinged

Centos system allows ping by default. If you have server root account management rights, you can permanently disable ping by modifying the Centos system kernel parameters. Edit the /etc/sysctl.conf file.

vi /etc/sysctl.conf

Add the following content at the end of /etc/sysctl.conf:

net.ipv4.icmp_echo_ignore_all=1 //1 is disabled, 0 is enabled

Execute after saving and exiting:

sysctl -p

Enable the configuration to take effect.

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