AlmaLinux OS 9 must configure a DNS processing mode set be Network Manager.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-269288 | ALMA-09-023560 | SV-269288r1050170_rule | Medium |
| Description |
| To ensure that DNS resolver settings are respected, a DNS mode in Network Manager must be configured. |
| STIG | Date |
| CloudLinux AlmaLinux OS 9 Security Technical Implementation Guide | 2025-05-22 |
Details
| Check Text (C-73319r1049447_chk) |
| Note: If AlmaLinux OS 9 is configured to use a DNS resolver other than Network Manager, the configuration must be documented and approved by the information system security officer (ISSO). Verify that AlmaLinux OS 9 has a DNS mode configured in Network Manager. $ NetworkManager --print-config [main] dns=none If the "dns" key in the [main] section does not exist or is not set to "none" or "default", this is a finding. |
| Fix Text (F-73220r1049448_fix) |
| Configure NetworkManager in AlmaLinux OS 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. $ systemctl reload NetworkManager |