Since DSM 6, there is no longer
/usr/syno/etc.defaults/rc.d/S01iptables.sh as mentioned in 2013 and 2014. The later thread mentioned the message,
insmod: ERROR: could not insert module /lib/modules/nf_nat.ko: Unknown symbol in module, but till 2017, no one solve this problem.
Starting with DSM version 6.1 Synology has removed File Station from the core and swapped the Search functionality from File Station with its own package called “Universal Search“. I’ve noticed some users, myself included, don’t use this package and don’t even want it in their Synology; however, it cannot be disabled or uninstalled via Package Center.