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RHEL-09-252045 RHEL 9 must not have unauthorized IP tunnels configured.

DISA STIG library V2R10
All changes in this version
first version loaded CAT II

Maps to CM-6 via CCI-000366

Title

RHEL 9 must not have unauthorized IP tunnels configured.

Control

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.

Discussion

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).

Related controls

CCI-000366

Fix

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