RHEL 9 must not have unauthorized IP tunnels configured.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-257950 | RHEL-09-252045 | SV-257950r1045006_rule | Medium |
| Description |
| IP tunneling mechanisms can be used to bypass network filtering. If tunneling is required, it must be documented with the information system security officer (ISSO). |
| STIG | Date |
| Red Hat Enterprise Linux 9 Security Technical Implementation Guide | 2024-12-04 |
Details
| Check Text (C-61691r1045005_chk) |
| Verify that RHEL 9 does not have unauthorized IP tunnels configured. Determine if the "IPsec" service is active with the following command: $ systemctl is-active ipsec Inactive If the "IPsec" service is active, check for configured IPsec connections ("conn"), with the following command: $ sudo grep -rni conn /etc/ipsec.conf /etc/ipsec.d/ Verify any returned results are documented with the ISSO. If the IPsec tunnels are active and not approved, this is a finding. |
| Fix Text (F-61615r925836_fix) |
| Remove all unapproved tunnels from the system, or document them with the ISSO. |