Ubuntu 24.04: Implement 2.1.21 Ensure mail transfer agent is configured for local-only mode

[alanmcanonical]

Description:

• Implement 2.1.21 Ensure mail transfer agent is configured for local-only mode
• Add oval check logic for port 465 and 587

Rationale:

• Satisfies Ubuntu 24.04 CIS control 2.1.21

[openshift-ci]

Hi @alanmcanonical. Thanks for your PR.

I'm waiting for a ComplianceAsCode member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[github-actions]

Start a new ephemeral environment with changes proposed in this pull request:

rhel8 (from CTF) Environment (using Fedora as testing environment)

Fedora Testing Environment

Oracle Linux 8 Environment

[github-actions]

This datastream diff is auto generated by the check Compare DS/Generate Diff

Click here to see the full diff

OVAL for rule 'xccdf_org.ssgproject.content_rule_has_nonlocal_mta' differs.
--- oval:ssg-has_nonlocal_mta:def:1
+++ oval:ssg-has_nonlocal_mta:def:1
@@ -1,2 +1,2 @@
 criteria AND
-criterion oval:ssg-tst_nothing_listening_external_mta_port:tst:1
+criterion oval:ssg-tst_nothing_listening_external_mta_port_25:tst:1

[dodys]

@alanmcanonical could you please take a look at the failed automatus test on 24.04?

[alanmcanonical]

@alanmcanonical could you please take a look at the failed automatus test on 24.04?

It's still due to container env has problem with systemd/dbus

[mpurg]

lgtm, thanks!

[mpurg]

Try rebasing to fix the failing CI tests.

[codeclimate]

Code Climate has analyzed commit cef0292 and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 61.9% (0.0% change).

View more on Code Climate.

[dodys]

lgtm, thanks!