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← Back to Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide

V-282679

CAT II (Medium)

TOSS 5 must configure a DNS processing mode set in Network Manager.

Rule ID

SV-282679r1201334_rule

STIG

Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide

Version

V1R1

CCIs

CCI-000366

Discussion

In order to ensure that DNS resolver settings are respected, a DNS mode in Network Manager must be configured.

Check Content

Verify TOSS 5 has a DNS mode configured in Network Manager.

$ NetworkManager --print-config
[main]
dns=none

If the dns key under main does not exist or is not set to "none" or "default", this is a finding.

Fix Text

Configure NetworkManager in TOSS 5 to use a DNS mode.

In "/etc/NetworkManager/NetworkManager.conf" add the following line in the "[main]" section:

dns = none

Reload NetworkManager for the change to take effect.

$ sudo systemctl reload NetworkManager