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Monday, 14 September 2015

How to turn off ping replies.

The ping command can be useful to check if a machine is running however this can make your server more vulnerable to hacking.
If you want to turn the ping reply off use this command

sysctl -w net.ipv4.icmp_echo_ignore_all=1

To turn it back on again

sysctl -w net.ipv4.icmp_echo_ignore_all=0