The system must log martian packets.

From Red Hat Enterprise Linux 5 Security Technical Implementation Guide

Associated with IA controls: ECAT-1

Associated with: CCI-000126

SV-37630r1_rule The system must log martian packets.

Vulnerability discussion

Martian packets are packets containing addresses known by the system to be invalid. Logging these messages allows the SA to identify misconfigurations or attacks in progress.

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Configure the system to log martian packets. Edit /etc/sysctl.conf and add a setting for "net.ipv4.conf.all.log_martians=1" and "net.ipv4.conf.default.log_martians=1". Reload the sysctls. Procedure: # sysctl -p

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