A centralized syslog database with rule based systems to block malevolent sorts at our firewall boundaries. Didn't like any of the solutions I found to scratch

A centralized syslog database with rule based systems to block malevolent sorts at our firewall boundaries. Didn't like any of the solutions I found to scratch my itch. (Ok,not technically a start up, I started up many years ago. Been there, done that, forgot to sell the company.)