STIGQter STIGQter: STIG Summary: Red Hat Enterprise Linux 9 Security Technical Implementation Guide Version: 2 Release: 9 Benchmark Date: 01 Jul 2026:

RHEL 9 must not have unauthorized IP tunnels configured.

DISA Rule

SV-257950r1045006_rule

Vulnerability Number

V-257950

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

RHEL-09-252045

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

Remove all unapproved tunnels from the system, or document them with the ISSO.

Check Contents

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.

Vulnerability Number

V-257950

Documentable

False

Rule Version

RHEL-09-252045

Severity Override Guidance

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.

Check Content Reference

M

Target Key

5551