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debuser
Post  Post subject: How to block ping icmp echo requests without a firewall in Linux  |  Posted: Mon Nov 26, 2012 9:46 am

Joined: Thu Aug 06, 2009 2:48 am
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How to block ping icmp echo requests without a firewall in Linux

To stop all icmp echo-request packets in Linux without enabling a firewall use the following sysctl:
Code:
# sysctl net.ipv4.icmp_echo_ignore_all=1
net.ipv4.icmp_echo_ignore_all = 1


To check:
Code:
# tcpdump -nni eth0 icmp





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