← Back to SUSE Linux Enterprise Micro (SLEM) 5 Security Technical Implementation Guide

V-261325

CAT II (Medium)

SLEM 5 must not be performing Internet Protocol version 6 (IPv6) packet forwarding unless the system is a router.

Rule ID

SV-261325r996445_rule

STIG

SUSE Linux Enterprise Micro (SLEM) 5 Security Technical Implementation Guide

Version

V1R4

CCIs

CCI-000366

Discussion

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.

Check Content

Verify SLEM 5 is not performing IPv6 packet forwarding, unless the system is a router with the following command:

     > sudo sysctl net.ipv6.conf.all.forwarding
     net.ipv6.conf.all.forwarding = 0

If the network parameter "ipv6.conf.all.forwarding" is not equal to "0", or nothing is returned, this is a finding.

Fix Text

Configure SLEM 5 to not performing IPv6 packet forwarding by running the following command as an administrator:

     > sudo sysctl -w net.ipv6.conf.all.forwarding=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.ipv6.conf.all.forwarding=0" >> /etc/sysctl.d/99-stig.conf'

     > sudo sysctl --system