mediumnetworkverified ✓rollback-safe
Ensure net.ipv4.conf.all.send_redirects is set to 0
sysctl-net-ipv4-conf-all-send-redirects · RHEL ≥ 8 · 1 impl
Description
The kernel parameter net.ipv4.conf.all.send_redirects 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.ipv4.conf.all.send_redirects
- expected:
- 0
Remediatesysctl_set
- key:
- net.ipv4.conf.all.send_redirects
- value:
- 0
Framework references
CIS
rhel9 3.3.2rhel8 3.3.1.4rhel10 3.3.1.4
STIG
V-281351 / RHEL-10-800190V-230536 / RHEL-08-040220V-257968 / RHEL-09-253065
Live verification
rhel10:checkrhel8:checkrhel9:check
#sysctl#networking#hardening