Edit File: service.conf
# The "strict" security profile for services, all options turned on [Service] MountAPIVFS=yes TemporaryFileSystem=/run BindReadOnlyPaths=/run/systemd/notify BindReadOnlyPaths=/dev/log /run/systemd/journal/socket /run/systemd/journal/stdout BindReadOnlyPaths=/etc/machine-id DynamicUser=yes RemoveIPC=yes CapabilityBoundingSet= PrivateTmp=yes PrivateDevices=yes PrivateUsers=yes ProtectSystem=strict ProtectHome=yes ProtectKernelTunables=yes ProtectKernelModules=yes ProtectControlGroups=yes RestrictAddressFamilies=AF_UNIX LockPersonality=yes NoNewPrivileges=yes MemoryDenyWriteExecute=yes RestrictRealtime=yes RestrictNamespaces=yes SystemCallFilter=@system-service SystemCallErrorNumber=EPERM SystemCallArchitectures=native PrivateNetwork=yes IPAddressDeny=any TasksMax=4