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mediumnetworkverified rollback-safe

Ensure net.ipv6.conf.default.accept_ra is set to 0

sysctl-net-ipv6-conf-default-accept-ra · RHEL ≥ 8 · 1 impl

Description

The kernel parameter net.ipv6.conf.default.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.default.accept_ra
expected:
0
Remediatesysctl_set
key:
net.ipv6.conf.default.accept_ra
value:
0

Framework references

CIS

rhel8 3.3.2.8rhel10 3.3.2.8

STIG

V-281358 / RHEL-10-800260V-230542 / RHEL-08-040262V-257975 / RHEL-09-254030

Live verification

rhel10:checkrhel8:checkrhel9:check
#sysctl#networking#hardening