March 14, 2014

Disable Ping Request (ICMP Echo) in Linux Kernel

Prerequisite

Install the kernel documentation package, if you have not.

The package contains several documentation and you can list them all with 'rpm -ql kernel-doc'.

Test Before

Ok. The machine is responding to ping.

Set Kernel Parameter to Ignore Ping (ICMP echo) Request

Now use kernel configuration tool, sysctl, to first list all parameter that contain ICMP.

To find out what each parameter do read the kernel network ip sysctl documentation.

And to set kernel parameter.

Now test again to ping server and you should not get any respond.

To make the changes permanent.

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