The Photon operating system must log IPv4 packets with impossible addresses.
An XCCDF Rule
Description
The presence of "martian" packets (which have impossible addresses) as well as spoofed packets, source-routed packets, and redirects could be a sign of nefarious network activity. Logging these packets enables this activity to be detected.
- ID
- SV-256572r991589_rule
- Version
- PHTN-30-000103
- Severity
- Medium
- References
- Updated
Remediation Templates
A Manual Procedure
At the command line, run the following command:
# for SETTING in $(/sbin/sysctl -aN --pattern "net.ipv4.conf.(all|default|eth.*).log_martians"); do sed -i -e "/^${SETTING}/d" /etc/sysctl.conf;echo $SETTING=1>>/etc/sysctl.conf; done
# /sbin/sysctl --load