From c28da09fa8e3a0167b9c02673451c3e50394395d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?E=CC=81ric=20Gaspar?=
 <46165813+ericgaspar@users.noreply.github.com>
Date: Wed, 20 Sep 2023 18:14:03 +0200
Subject: [PATCH] Update systemd.service

---
 conf/systemd.service | 38 ++++++++++++++++++++++++++++++++++++--
 1 file changed, 36 insertions(+), 2 deletions(-)

diff --git a/conf/systemd.service b/conf/systemd.service
index 82e0c2e..cb6b986 100644
--- a/conf/systemd.service
+++ b/conf/systemd.service
@@ -13,11 +13,45 @@ RestartForceExitStatus=3 4
 # Depending on specificities of your service/app, you may need to tweak these 
 # .. but this should be a good baseline
 # Details for these options: https://www.freedesktop.org/software/systemd/man/systemd.exec.html
-NoNewPrivileges=true
+#NoNewPrivileges=true
+#PrivateTmp=yes
+#ProtectSystem=full
+#SystemCallArchitectures=native
+#MemoryDenyWriteExecute=true
+
+# Sandboxing options to harden security
+# Depending on specificities of your service/app, you may need to tweak these
+# .. but this should be a good baseline
+# Details for these options: https://www.freedesktop.org/software/systemd/man/systemd.exec.html
+NoNewPrivileges=yes
 PrivateTmp=yes
+PrivateDevices=yes
+RestrictAddressFamilies=AF_UNIX AF_INET AF_INET6 AF_NETLINK
+RestrictNamespaces=yes
+RestrictRealtime=yes
+DevicePolicy=closed
+ProtectClock=yes
+ProtectHostname=yes
+ProtectProc=invisible
 ProtectSystem=full
+ProtectControlGroups=yes
+ProtectKernelModules=yes
+ProtectKernelTunables=yes
+LockPersonality=yes
 SystemCallArchitectures=native
-MemoryDenyWriteExecute=true
+SystemCallFilter=~@clock @debug @module @mount @obsolete @reboot @setuid @swap @cpu-emulation @privileged
+
+# Denying access to capabilities that should not be relevant for webapps
+# Doc: https://man7.org/linux/man-pages/man7/capabilities.7.html
+CapabilityBoundingSet=~CAP_RAWIO CAP_MKNOD
+CapabilityBoundingSet=~CAP_AUDIT_CONTROL CAP_AUDIT_READ CAP_AUDIT_WRITE
+CapabilityBoundingSet=~CAP_SYS_BOOT CAP_SYS_TIME CAP_SYS_MODULE CAP_SYS_PACCT
+CapabilityBoundingSet=~CAP_LEASE CAP_LINUX_IMMUTABLE CAP_IPC_LOCK
+CapabilityBoundingSet=~CAP_BLOCK_SUSPEND CAP_WAKE_ALARM
+CapabilityBoundingSet=~CAP_SYS_TTY_CONFIG
+CapabilityBoundingSet=~CAP_MAC_ADMIN CAP_MAC_OVERRIDE
+CapabilityBoundingSet=~CAP_NET_ADMIN CAP_NET_BROADCAST CAP_NET_RAW
+CapabilityBoundingSet=~CAP_SYS_ADMIN CAP_SYS_PTRACE CAP_SYSLOG
 
 [Install]
 WantedBy=multi-user.target