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 | CCI-000366 | 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-258891r933734_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.