AlmaLinux OS 9 must not enable IP packet forwarding unless the system is a router.
An XCCDF Rule
Description
Routing protocol daemons are typically used on routers to exchange network topology information with other routers. If this capability is used when not required, system network information may be unnecessarily transmitted across the network.
- ID
- SV-269249r1050131_rule
- Version
- ALMA-09-019160
- Severity
- Medium
- References
- Updated
Remediation Templates
A Manual Procedure
Configure AlmaLinux OS 9 to not allow IP packet forwarding, unless the system is a router.
Create a numbered *.conf file in /etc/sysctl.d/ with the following content:
net.ipv4.conf.all.forwarding = 0
net.ipv4.conf.default.forwarding = 0