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samplicator
Send copies of (UDP) datagrams to multiple receivers, with optional sampling and spoofing
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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.
I've got a UDM myself. I use https://github.com/unifi-utilities/unifios-utilities on-boot-script and a version of their dns redirect script for the iptables nat. It works quite well.
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