Ping prohibited in Linux

The Ping Command is an application for computers to check whether the lines are in good condition.ProgramThe transmission of exchange data between computers is not encrypted. Therefore, when we use the ping command to detect a server, an illegal molecule may exist on the Internet, attackers steal information transmitted on the network line through special hacking programs and use the stolen information to attack the specified server or system, therefore, it is necessary to disable the ping command in Linux. In Linux, if you want to make Ping unresponsive, that is, to ignore the ICMP packet, you can enter the following command in the Linux Command Line:

Echo 1>/proc/sys/NET/IPv4/icmp_echo_ignore_all;

If you want to resume using the ping command, you can enter:

Command Echo 0>/proc/sys/NET/IPv4/icmp_echo_ignore_all