SLEM 5 must not be performing Internet Protocol version 4 (IPv4) packet forwarding unless the system is a router.

An XCCDF Rule

Description

<VulnDiscussion>Routing protocol daemons are typically used on routers to exchange network topology information with other routers. If this software is used when not required, system network information may be unnecessarily transmitted across the network.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>

ID: SV-261319r996427_rule
Severity: Medium
References: CCI-000366
Updated: 17 days ago

Configure SLEM 5 to not performing IPv4 packet forwarding by running the following command as an administrator:

     > sudo sysctl -w net.ipv4.ip_forward=0

If "0" is not the system's default value, add or update the following line in "/etc/sysctl.d/99-stig.conf":
     > sudo sh -c 'echo "net.ipv4.ip_forward=0" >> /etc/sysctl.d/99-stig.conf'

     > sudo sysctl --system

SLEM 5 must not be performing Internet Protocol version 4 (IPv4) packet forwarding unless the system is a router.

Description

Remediation - Manual Procedure