Disable Ping in Linux
There are
several methods by which a Ping response can be rendered disabled such as
server security, in order to prevent network congestion.
TYPES:- 1. Temporary 2. Permanent
Disable Ping response Temporarily:
The ping response can be temporarily disabled by
running the following command as root
# echo
"1" > /proc/sys/net/ipv4/icmp_echo_ignore_all
As a
consequence the kernel is instructed to ignore the ping request. However this
is a temporary method and will get removed on rebooting the server.
To enable
the ping response back you can run the following command:
# echo
"0" > /proc/sys/netipv4/icmp_echo_ignore_all
The method
adopted enables the ping temporarily if the ping is disabled permanently.
Disable Ping Response Permanently
To
permanently disable the ping response perform the following simple steps:
1. Open the sysctl.conf file in any text editor:
1. Open the sysctl.conf file in any text editor:
# vi
/etc/sysctl.conf
2. Add the
following line at the end of the file:
net.ipv4.icmp_echo_ignore_all
= 1
3. Now save the code and exit from the file.
:wq
4. Then Execute “sysctl -p” to enforce this setting immediately.
4. Then Execute “sysctl -p” to enforce this setting immediately.
# sysctl
-p
Once
the above cited steps are followed, it will be noticed that the server no
longer reacts to your ping responses.
By :- Vishal Sharma
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