Index: stunnel-5.69/tools/stunnel.service.in
===================================================================
--- stunnel-5.69.orig/tools/stunnel.service.in
+++ stunnel-5.69/tools/stunnel.service.in
@@ -4,6 +4,19 @@ After=syslog.target network-online.targe
 Wants=syslog.target network-online.target
 
 [Service]
+# added automatically, for details please see
+# https://en.opensuse.org/openSUSE:Security_Features#Systemd_hardening_effort
+ProtectSystem=full
+ProtectHome=true
+PrivateDevices=true
+ProtectHostname=true
+ProtectClock=true
+ProtectKernelTunables=true
+ProtectKernelModules=true
+ProtectKernelLogs=true
+ProtectControlGroups=true
+RestrictRealtime=true
+# end of automatic additions
 LimitNOFILE=20480
 ExecStart=@bindir@/stunnel
 ExecReload=/bin/kill -HUP $MAINPID