From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.proxmox.com (Postfix) with ESMTPS id 9F29D91CFE for ; Mon, 20 Mar 2023 11:36:03 +0100 (CET) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id 818D128F3 for ; Mon, 20 Mar 2023 11:36:03 +0100 (CET) Received: from proxmox-new.maurer-it.com (proxmox-new.maurer-it.com [94.136.29.106]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by firstgate.proxmox.com (Proxmox) with ESMTPS for ; Mon, 20 Mar 2023 11:36:02 +0100 (CET) Received: from proxmox-new.maurer-it.com (localhost.localdomain [127.0.0.1]) by proxmox-new.maurer-it.com (Proxmox) with ESMTP id 265B045A3C for ; Mon, 20 Mar 2023 11:36:02 +0100 (CET) From: Christoph Heiss To: pmg-devel@lists.proxmox.com Date: Mon, 20 Mar 2023 11:35:44 +0100 Message-Id: <20230320103548.382757-1-c.heiss@proxmox.com> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SPAM-LEVEL: Spam detection results: 0 AWL -0.070 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record Subject: [pmg-devel] [PATCH v2 pmg-{api, gui, docs} 0/4] fix #2437: Add TLS enforcment option for inbound domains X-BeenThere: pmg-devel@lists.proxmox.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Proxmox Mail Gateway development discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 20 Mar 2023 10:36:03 -0000 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:// -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