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The Photon operating system must log IPv4 packets with impossible addresses.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-258891 | PHTN-40-000228 | SV-258891r933734_rule | Medium |
| 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. |
| STIG | Date |
|---|---|
| VMware vSphere 8.0 vCenter Appliance Photon OS 4.0 Security Technical Implementation Guide | 2023-10-29 |
Details
| Check Text ( C-62631r933732_chk ) |
|---|
| 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 Text (F-62540r933733_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. |