The Photon operating system must log IPv4 packets with impossible addresses.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-258891 | SRG-OS-000480-GPOS-00227 | PHTN-40-000228 | SV-258891r991589_rule | 2024-07-11 | 2 |
| 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. |
| ℹ️ Check |
|---|
| At the command line, run the following command to verify martian packets are logged: # /sbin/sysctl -a --pattern "net.ipv4.conf.(all|default).log_martians" Expected result: net.ipv4.conf.all.log_martians = 1 net.ipv4.conf.default.log_martians = 1 If the "log_martians" kernel parameters are not set to "1", this is a finding. |
| ✔️ Fix |
|---|
| Navigate to and open: /etc/sysctl.d/zz-stig-hardening.conf Add or update the following lines: net.ipv4.conf.all.log_martians = 1 net.ipv4.conf.default.log_martians = 1 At the command line, run the following command to load the new configuration: # /sbin/sysctl --load /etc/sysctl.d/zz-stig-hardening.conf Note: If the file zz-stig-hardening.conf does not exist, it must be created. |