How to block ping on Linux Servers

If you want to block ping requests to your critical linux servers due to security concerns then do the following:

Edit the file /etc/sysctl.conf

[root@server~]# vim /etc/sysctl.conf
and look for this line:

and set its value qual to 1
NOTE: if you dont find net.ipv4.icmp_echo_ignore_all then simply added to the last line be sure the the value is equals to 1.
So make it look like this:
net.ipv4.icmp_echo_ignore_all = 1

After that, to make changes effective without rebooting run following command:
#sysctl -p


About Manish Jha

Hi All I am Manish Kumar Jha aka Alex Hunt. I am currently working in VMware Software India Pvt Ltd as Operations System Engineer (vCloud Air Operations). I have around 5 Years of IT experience and have exposure on VMware vSphere, vCloud Director, RHEL and modern data center technologies like Cisco UCS and Cisco Nexus 1000v and NSX. If you find any post informational to you please press like and share it across social media and leave your comments if you want to discuss further on any post. Disclaimer: All the information on this website is published in good faith and for general information purpose only. I don’t make any warranties about the completeness, reliability and accuracy of this information. Any action you take upon the information you find on this blog is strictly at your own risk. The Views and opinions published on this blog are my own and not the opinions of my employer or any of the vendors of the product discussed.
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