STIGQter: STIG Summary: SLES 12 Security Technical Implementation Guide Version: 2 Release: 3 Benchmark Date: 23 Apr 2021:

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

DISA Rule

SV-217296r646767_rule

Vulnerability Number

V-217296

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

SLES-12-030430

Severity

CAT II

CCI(s)

• CCI-000366 - The organization implements the security configuration settings.

Weight

10

Fix Recommendation

Configure the SUSE operating system 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

Check Contents

Verify the SUSE operating system is not performing IPv4packet forwarding, unless the system is a router.

Check to see if IPv4 forwarding is enabled using the following command:

> sysctl net.ipv4.ip_forward
net.ipv4.ip_forward = 0

If the network parameter "ipv4.ip_forward" is not equal to "0" or nothing is returned, this is a finding.

Vulnerability Number

V-217296

Documentable

False

Rule Version

SLES-12-030430

Severity Override Guidance

Verify the SUSE operating system is not performing IPv4packet forwarding, unless the system is a router.

Check to see if IPv4 forwarding is enabled using the following command:

> sysctl net.ipv4.ip_forward
net.ipv4.ip_forward = 0

If the network parameter "ipv4.ip_forward" is not equal to "0" or nothing is returned, this is a finding.

Check Content Reference

M

Target Key

4033

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