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crowdsec
CrowdSec - the open-source and participative security solution offering crowdsourced protection against malicious IPs and access to the most advanced real-world CTI.
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see awesome-security
A collection of awesome software, libraries, documents, books, resources and cools stuffs about security.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
On top of these great suggestions I would also suggest using CrowdSec instead of f2b. CrowdSec is free, open source crowd sourced threat intelligence.
Regarding awesome-sysadmin: thanks for the tip but we're already in the process :-) https://github.com/sbilly/awesome-security/pull/177