OL 9 must configure a DNS processing mode set be Network Manager.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-271860 | OL09-00-006002 | SV-271860r1092292_rule | Medium |
| Description |
| To ensure that DNS resolver settings are respected, a DNS mode in Network Manager must be configured. |
| STIG | Date |
| Oracle Linux 9 Security Technical Implementation Guide | 2025-05-08 |
Details
| Check Text (C-75910r1092290_chk) |
| Verify that OL 9 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 (F-75817r1092291_fix) |
| Configure NetworkManager in OL 9 to use a DNS mode. In "/etc/NetworkManager/NetworkManager.conf" add the following line in the "[main]" section: dns = none NetworkManager must be reloaded for the change to take effect. $ sudo systemctl reload NetworkManager |