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From: Christoph Heiss <c.heiss@proxmox.com>
To: pmg-devel@lists.proxmox.com
Date: Mon, 20 Mar 2023 11:35:44 +0100
Message-Id: <20230320103548.382757-1-c.heiss@proxmox.com>
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Subject: [pmg-devel] [PATCH v2 pmg-{api, gui,
docs} 0/4] fix #2437: Add TLS enforcment option for inbound domains
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TL;DR: Implements the approach as laid out by Stoiko in the Bugzilla
ticket [0].
A new API endpoint is added - /api2/json/config/tlsinbounddomains. This
is used to configure the newly introduced postfix map at
/etc/pmg/tls_inbound_domains, specifying sender domains which get the
`reject_plaintext_session` action [1] set, thus requiring TLS-encrypted
sessions on inbound connections.
On the GUI side, a new panel is added in Configuration -> Mail Proxy ->
TLS, where the domains for which this should be enforced can be specified.
Testing
-------
Tested this to the best of my knowledge, by adding some domains using
the UI and using `curl` to send some simple mails:
echo '' | curl -skv smtp://<host> -T - \
--mail-from foo@localhost.localdomain \
--mail-rcpt bar@localhost.localdomain
.. where `localhost.localdomain` is on the new 'TLS Inbound Domains' list.
This will now fail with:
450 4.7.1 Session encryption is required
When additionally adding the `--ssl-reqd` option to curl (instructing it
to require a TLS-encrypted session), the above command will succeed.
(Also tested it with a domain not on the list, checking that no
regressions are introduced.)
[0] https://bugzilla.proxmox.com/show_bug.cgi?id=2437
[1] http://www.postfix.org/postconf.5.html#reject_plaintext_session
v1: https://lists.proxmox.com/pipermail/pmg-devel/2023-March/002296.html
---
pmg-api:
Christoph Heiss (2):
fix #2437: config: Add new tls_inbound_domains postfix map
fix #2437: api: Add endpoint for managing tls_inbound_domains entries
src/Makefile | 1 +
src/PMG/API2/Config.pm | 7 +++
src/PMG/API2/InboundTLSDomains.pm | 127 ++++++++++++++++++++++++++++++++++++++
src/PMG/Cluster.pm | 1 +
src/PMG/Config.pm | 56 +++++++++++++++++
src/templates/main.cf.in | 1 +
6 files changed, 193 insertions(+)
pmg-gui:
Christoph Heiss (1):
fix #2437: proxy: Add 'TLS Inbound Domains' panel
js/MailProxyTLSInboundDomains.js | 93 ++++++++++++++++++++++++++++++++++++++++
js/MailProxyTLSPanel.js | 8 +++-
js/Makefile | 1 +
3 files changed, 101 insertions(+), 1 deletion(-)
pmg-docs:
Christoph Heiss (1):
pmgconfig: Explain new TLS inbound domains configuration
pmgconfig.adoc | 11 +++++++++++
1 file changed, 11 insertions(+)
--
2.39.2