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Gravitational Teleport
The easiest, and most secure way to access and protect all of your infrastructure.
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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.
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PostgreSQL
Mirror of the official PostgreSQL GIT repository. Note that this is just a *mirror* - we don't work with pull requests on github. To contribute, please see https://wiki.postgresql.org/wiki/Submitting_a_Patch
Disclaimer: I work at Teleport
Teleport is Apache2 open core:
https://github.com/gravitational/teleport
I use almost the same approach.
I also limit access to just one IP, which is a VPN server hosted on a different cloud provider.
You can run a bulletproof VPN server easily using something like algo (https://github.com/trailofbits/algo)