From 3b6901b5d2a36710dbd36606977afe9fb4c049f4 Mon Sep 17 00:00:00 2001
From: Ben Grande <ben.grande.b@gmail.com>
Date: Thu, 18 Jul 2024 16:18:36 +0200
Subject: [PATCH] fix: remove broken Signal firewall rules

As NFTables converts domain names to IPs on the first query, it is not
possible to depend on it to have a stable connection. Implementing a DNS
proxy configuration might still be difficult due to the use of CDNs.
---
 salt/signal/README.md    | 15 +--------------
 salt/signal/create.sls   |  4 ----
 salt/signal/firewall.sls | 24 ------------------------
 salt/signal/firewall.top | 10 ----------
 salt/signal/init.top     |  1 -
 5 files changed, 1 insertion(+), 53 deletions(-)
 delete mode 100644 salt/signal/firewall.sls
 delete mode 100644 salt/signal/firewall.top

diff --git a/salt/signal/README.md b/salt/signal/README.md
index 4d5f802..314abeb 100644
--- a/salt/signal/README.md
+++ b/salt/signal/README.md
@@ -40,17 +40,4 @@ sudo qubesctl state.apply signal.appmenus
 
 You may use different Signal accounts for different identities, such as
 personal, work or pseudonym. Maintain the `signal` qube pristine and clone it
-to the assigned domain, `personal-signal`, `work-signal`, `anon-signal`. If
-you don't maintain the qube pristine, you will have to apply the firewall
-rules manually.
-
-Signal might loose connectivity due to [upstream rotating IP
-addresses](https://support.signal.org/hc/en-us/articles/360007320291) with the
-use of [CDNs to evade
-blocking](https://signal.org/blog/looking-back-on-the-front/).
-You will have to reapply the firewall rules eventually.
-
-TODO: Is it worth using the firewall? If you allow all [cloudfront.net
-IPs](https://ip-ranges.amazonaws.com/ip-ranges.json) for region "GLOBAL", what
-is blocking an attacker from using that to host his malicious callback server?
-Recently (2023-11-11) signal stopped working with the current firewall.
+to the assigned domain, `personal-signal`, `work-signal`, `anon-signal`.
diff --git a/salt/signal/create.sls b/salt/signal/create.sls
index e7b50e3..9963a9e 100644
--- a/salt/signal/create.sls
+++ b/salt/signal/create.sls
@@ -8,7 +8,6 @@ SPDX-License-Identifier: AGPL-3.0-or-later
 
 include:
   - .clone
-  - .firewall
 
 {% load_yaml as defaults -%}
 name: tpl-{{ slsdotpath }}
@@ -52,6 +51,3 @@ features:
   - menu-items: "signal-desktop.desktop qubes-open-file-manager.desktop qubes-run-terminal.desktop qubes-start.desktop"
 {%- endload %}
 {{ load(defaults) }}
-
-{% from 'utils/macros/sync-appmenus.sls' import sync_appmenus with context -%}
-{{ sync_appmenus('tpl-' ~ sls_path) }}
diff --git a/salt/signal/firewall.sls b/salt/signal/firewall.sls
deleted file mode 100644
index 40b1620..0000000
--- a/salt/signal/firewall.sls
+++ /dev/null
@@ -1,24 +0,0 @@
-{#
-SPDX-FileCopyrightText: 2023 Benjamin Grande M. S. <ben.grande.b@gmail.com>
-
-SPDX-License-Identifier: AGPL-3.0-or-later
-#}
-
-"{{ slsdotpath }}-firewall":
-  cmd.run:
-    - require:
-      - qvm: {{ slsdotpath }}
-    - name: |
-        qvm-check -q --running -- {{ slsdotpath }} && qvm-pause -- {{ slsdotpath }}
-        qvm-firewall -- {{ slsdotpath }} reset
-        qvm-firewall -- {{ slsdotpath }} del --rule-no 0
-        qvm-check -q --running -- {{ slsdotpath }} && qvm-unpause -- {{ slsdotpath }}
-        qvm-firewall -- {{ slsdotpath }} add accept signal.org
-        qvm-firewall -- {{ slsdotpath }} add accept storage.signal.org
-        qvm-firewall -- {{ slsdotpath }} add accept chat.signal.org
-        qvm-firewall -- {{ slsdotpath }} add accept cdn.signal.org
-        qvm-firewall -- {{ slsdotpath }} add accept cdn2.signal.org
-        qvm-firewall -- {{ slsdotpath }} add accept sfu.voip.signal.org
-        qvm-firewall -- {{ slsdotpath }} add accept turn.voip.signal.org
-        qvm-firewall -- {{ slsdotpath }} add accept turn2.voip.signal.org
-        qvm-firewall -- {{ slsdotpath }} add accept turn3.voip.signal.org
diff --git a/salt/signal/firewall.top b/salt/signal/firewall.top
deleted file mode 100644
index 12317a5..0000000
--- a/salt/signal/firewall.top
+++ /dev/null
@@ -1,10 +0,0 @@
-{#
-SPDX-FileCopyrightText: 2023 Benjamin Grande M. S. <ben.grande.b@gmail.com>
-
-SPDX-License-Identifier: AGPL-3.0-or-later
-#}
-
-base:
-  'dom0':
-    - match: nodegroup
-    - signal.firewall
diff --git a/salt/signal/init.top b/salt/signal/init.top
index 2126c4c..4116273 100644
--- a/salt/signal/init.top
+++ b/salt/signal/init.top
@@ -8,7 +8,6 @@ base:
   'dom0':
     - match: nodegroup
     - signal.create
-    - signal.firewall
   'tpl-signal':
     - signal.install
   'signal':