AlmaLinux OS 9 must not have unauthorized IP tunnels configured.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-269250 | ALMA-09-019270 | SV-269250r1050132_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 | |||
| CloudLinux AlmaLinux OS 9 Security Technical Implementation Guide | 2025-05-22 | |||
Details
Check Text (C-269250r1050132_chk)
Verify that AlmaLinux OS 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; preset: disabled)
Active: inactive (dead)
If the "IPsec" service is active, check for configured IPsec connections ("conn"), with the following command:
$ grep -ri conn /etc/ipsec.conf /etc/ipsec.d/ | grep -v '#'
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-73182r1048127_fix)
Remove all unapproved tunnels from the system, or document them with the ISSO.