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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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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.
First, you have to open as little ports as you can. For instance, if you are the only user of your apps, you might access them only through a vpn (I use https://www.wireguard.com/). If you need to open ports, you should :
install a security tool like https://crowdsec.net/ and configure it to serve your needs.
NOTE:
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Hence, a higher number means a more popular project.