sysctl tunable parameters
If you need Linux to ignore ping requests, edit the /etc/sysctl.conf file and add the following line:
net.ipv4.icmp_echo_ignore_all = 1
If you want or need Linux to ignore broadcast requests, edit the /etc/sysctl.conf file and add the following line:
net.ipv4.icmp_echo_ignore_broadcasts = 1
To alert you about bad error messages in the network, edit the /etc/sysctl.conf file and add the following line:
net.ipv4.icmp_ignore_bogus_error_responses = 1
To turn on logging for Spoofed Packets, Source Routed Packets, and Redirect Packets, edit the /etc/sysctl.conf file and add the following line:
net.ipv4.conf.all.log_martians = 1
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