Detections
Analytics
PHTN-40-000229 - The Photon operating system must use a reverse-path filter for IPv4 network traffic.
Information
Enabling reverse path filtering drops packets with source addresses that should not have been able to be received on the interface they were received on. It should not be used on systems that are routers for complicated networks but is helpful for end hosts and routers serving small networks.Solution
Navigate to and open:/etc/sysctl.d/zz-stig-hardening.conf
Add or update the following lines:
net.ipv4.conf.all.rp_filter = 1
net.ipv4.conf.default.rp_filter = 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.
See Also
https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_VMW_vSphere_8-0_Y24M08_STIG.zip
Item Details
Category: CONFIGURATION MANAGEMENT
References: 800-53|CM-6b., CAT|II, CCI|CCI-000366, Rule-ID|SV-258892r991589_rule, STIG-ID|PHTN-40-000229, Vuln-ID|V-258892
Plugin: Unix
Control ID: f32f400527819ef1a67a5668c6e821eb7e390785fcf063640221f1c3569bd741