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Old Server:

# /lib/systemd/system/apache2.service
[Unit]
Description=The Apache HTTP Server
After=network.target remote-fs.target nss-lookup.target
Documentation=https://httpd.apache.org/docs/2.4/

[Service]
Type=forking
Environment=APACHE_STARTED_BY_SYSTEMD=true
ExecStart=/usr/sbin/apachectl start
ExecStop=/usr/sbin/apachectl stop
ExecReload=/usr/sbin/apachectl graceful
PrivateTmp=true
Restart=on-abort

[Install]
WantedBy=multi-user.target
root@speedtest:~#

New Server:

# /usr/lib/systemd/system/apache2.service
[Unit]
Description=The Apache HTTP Server
After=network.target remote-fs.target nss-lookup.target
Documentation=https://httpd.apache.org/docs/2.4/

[Service]
Type=notify
Environment=APACHE_STARTED_BY_SYSTEMD=true
ExecStart=/usr/sbin/apachectl start
ExecStop=/usr/sbin/apachectl graceful-stop
ExecReload=/usr/sbin/apachectl graceful
# Send SIGWINCH for graceful stop
KillSignal=SIGWINCH
KillMode=mixed
PrivateTmp=true
Restart=on-abnormal
OOMPolicy=continue
RemoveIPC=yes

DevicePolicy=closed
KeyringMode=private
LockPersonality=yes
MemoryDenyWriteExecute=yes
PrivateDevices=yes
ProtectClock=yes
ProtectControlGroups=yes
ProtectHome=read-only
ProtectHostname=yes
ProtectKernelLogs=yes
ProtectKernelModules=yes
ProtectKernelTunables=yes
ProtectSystem=full
RestrictNamespaces=yes
RestrictRealtime=yes
RestrictSUIDSGID=yes
SystemCallArchitectures=native
ProtectProc=invisible
ProcSubset=pid

ReadWritePaths=/var/log/apache2
ReadWritePaths=/var/cache/apache2/mod_cache_disk

InaccessiblePaths=/boot
InaccessiblePaths=/root
InaccessiblePaths=-/etc/sudoers
InaccessiblePaths=-/etc/sudoers.d
InaccessiblePaths=-/etc/ssh
InaccessiblePaths=-/etc/apt
InaccessiblePaths=-/etc/.git
InaccessiblePaths=-/etc/.svn

[Install]
WantedBy=multi-user.target
root@speedtest:~#

Good catch! Will have a look at the “InaccessiblePaths”-Lines.

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