Detections
Analytics
RHEL-10-800120 - RHEL 10 must log Internet Protocol version 4 (IPv4) packets with impossible addresses by default.
Information
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.Satisfies: SRG-OS-000420-GPOS-00186, SRG-OS-000142-GPOS-00075
Solution
Configure RHEL 10 to log martian packets on IPv4 interfaces by default.Create a configuration file if it does not already exist:
$ sudo vi /etc/sysctl.d/99-ipv4_log_martians.conf
Add the following line to the file:
net.ipv4.conf.default.log_martians=1
Reload settings from all system configuration files with the following command:
$ sudo sysctl --system
See Also
https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_RHEL_10_V1R1_STIG.zip
Item Details
Audit Name: DISA Red Hat Enterprise Linux 10 STIG v1r1
Category: SYSTEM AND COMMUNICATIONS PROTECTION
References: 800-53|SC-5, 800-53|SC-7(1), CAT|II, CCI|CCI-001099, CCI|CCI-002385, Rule-ID|SV-281344r1167182_rule, STIG-ID|RHEL-10-800120, Vuln-ID|V-281344
Plugin: Unix
Control ID: 3add6d45bd9d2353a58e93d42e8d31d36ab744ad325dd46110af6673b56895f4