@4BDN_1 said in RESOLVED: Snort and Suricata Service Startup Failures on ET rules update:
Had another rule error using IPS Policy Max-Detect: FATAL ERROR: /usr/local/etc/snort/snort_58840_igb0/rules/snort.rules(76593) Unknown rule option: 'modbus_func'.
You likely do not have the MODBUS preprocessor enabled, hence the "unknown rule option" error. Modbus is an industrial controls protocol that has no function in a typical home or business network environment. It is pointless to run those rules in such networks.