OL 9 must not have unauthorized IP tunnels configured.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-271863 | OL09-00-006010 | SV-271863r1092639_rule | CCI-000366 | 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 | |||
| Oracle Linux 9 Security Technical Implementation Guide | 2025-05-08 | |||
Details
Check Text (C-271863r1092639_chk)
Verify that OL 9 does not have unauthorized IP tunnels configured.
Determine if the IPsec service is active with the following command:
$ systemctl status ipsec
ipsec.service - Internet Key Exchange (IKE) Protocol Daemon for IPsec
Loaded: loaded (/usr/lib/systemd/system/ipsec.service; disabled)
Active: inactive (dead)
If the IPsec service is active, check for configured IPsec connections ("conn"), with the following command:
$ 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-75820r1092300_fix)
Remove all unapproved tunnels from the system, or document them with the ISSO.