Red Hat Enterprise Linux 10 Security Technical Implementation Guide

The Red Hat Enterprise Linux 10 Security Technical Implementation Guide (V1 R3) has 435 STIG checks. New to STIG checklists? Read What is a STIG checklist?, CKL vs CKLB, and STIG vs SCAP benchmark.

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Severity

Version

V1 · R3

CurrentPublished Wed Sep 30 2026

RHEL 10 must not have unauthorized IP tunnels configured.

Red Hat Enterprise Linux 10 Security Technical Implementation Guide

Assessment Title

Rule Text

RHEL 10 must not have unauthorized IP tunnels configured.

Description

Discussion Text

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).

New to STIG checklists? Read What is a STIG checklist? and CKL vs CKLB.

Objective

V-281339

Rule

SV-281339r1268226_rule

Severity

medium

Rule Version

RHEL-10-800070

Documentable

false

IA Controls

NIST SP 800-53

Rev 5

Assessment Procedure

Check Text

Verify RHEL 10 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.

Implementation Procedure

Fix Text

Configure RHEL 10 to not have unauthorized IP tunnels configured.

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

STIG check 406 of 435 in the Red Hat Enterprise Linux 10 STIG checklist

← Previous · V-281338RHEL 10 must have at least two name servers configured for systems using Domain Name Server (DNS) resolution.Next · V-281340 →RHEL 10 must be configured to use Transmission Control Protocol (TCP) syncookies.