mediumnetworkverified ✓rollback-safe
Ensure net.ipv6.conf.all.accept_ra is set to 0
sysctl-net-ipv6-conf-all-accept-ra · RHEL ≥ 8 · 1 impl
Description
The kernel parameter net.ipv6.conf.all.accept_ra must be set to 0 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.ipv6.conf.all.accept_ra
- expected:
- 0
Remediatesysctl_set
- key:
- net.ipv6.conf.all.accept_ra
- value:
- 0
Framework references
CIS
rhel9 3.3.11rhel8 3.3.2.7rhel10 3.3.2.7
STIG
V-281354 / RHEL-10-800220V-230541 / RHEL-08-040261V-257971 / RHEL-09-254010
Live verification
rhel10:checkrhel8:checkrhel9:check
#sysctl#networking#hardening