SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide

The SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide (V1 R12) has 550 STIG checks. New to STIG checklists? Read What is a STIG checklist?, CKL vs CKLB, and STIG vs SCAP benchmark.

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Severity

Version

V1 · R12

CurrentPublished Fri Oct 26 2018

The system must not have IP forwarding for IPv6 enabled, unless the system is an IPv6 router.

SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide

Assessment Title

Rule Text

The system must not have IP forwarding for IPv6 enabled, unless the system is an IPv6 router.

Description

Discussion Text

If the system is configured for IP forwarding and is not a designated router, it could be used to bypass network security by providing a path for communication not filtered by network devices.

New to STIG checklists? Read What is a STIG checklist? and CKL vs CKLB.

Objective

V-22491

Rule

SV-46115r2_rule

Severity

medium

Rule Version

GEN005610

Documentable

false

IA Controls

NIST SP 800-53

Rev 5

Assessment Procedure

Check Text

Check if the system is configured for IPv6 forwarding.

# grep [01] /proc/sys/net/ipv6/conf/*/forwarding|egrep "default|all"

If the /proc/sys/net/ipv6/conf/*/forwarding entries do not exist because of compliance with GEN007720, this is not a finding.

If all of the resulting lines do not end with 0, this is a finding.

Implementation Procedure

Fix Text

Disable IPv6 forwarding.

Edit /etc/sysctl.conf and add a setting for "net.ipv6.conf.all.forwarding=0" and "net.ipv6.conf.default.forwarding=0".

Reload the sysctls.
Procedure:
# sysctl -p

STIG check 239 of 550 in the SUSE Linux Enterprise Server v11 for System z STIG checklist

← Previous · V-22490The system must be configured with a default gateway for IPv6 if the system uses IPv6, unless the system is a router.Next · V-22492 →The Network File System (NFS) export configuration file must be group-owned by root, bin, sys, or system.