Just in case anybody is/was wondering:
There were two errors in the
Etnetera Aggressive Blacklist Rules, which caused ‘suricata’ to fail loading two rule lines:
[ERRCODE: SC_ERR_INVALID_SIGNATURE(39)] - error parsing signature "drop ip [220. 158.142.114,2604:a880:4:1d0::2b8:0,(Empty Value),172.17.2.100,18.104.22.168, ...]
email@example.com => Both errors were fixed within 30 minutes. Wow!
To update, open GUI
Intrusion Prevention, edit (if activated)
Etnetera Aggressive Blacklist Rules and choose the button
Force Ruleset Update.