mediumnetworkverified ✓rollback-safe
Ensure net.ipv4.conf.default.log_martians is set to 1
sysctl-net-ipv4-conf-default-log-martians · RHEL ≥ 8 · 1 impl
Description
The kernel parameter net.ipv4.conf.default.log_martians must be set to 1 to enforce this network/kernel security control.
Rationale
Improper network kernel parameters can allow network-based attacks including packet redirection, source routing, and denial of service.
Check → Remediate
Checksysctl_value
- key:
- net.ipv4.conf.default.log_martians
- expected:
- 1
Remediatesysctl_set
- key:
- net.ipv4.conf.default.log_martians
- value:
- 1
Framework references
CIS
rhel8 3.3.1.17rhel10 3.3.1.17
STIG
V-281344 / RHEL-10-800120V-257961 / RHEL-09-253030
Live verification
rhel10:checkrhel9:check
#sysctl#networking#hardening