Berkeley has this really cool program called BOINC that you can download and donate your computer’s resources to processing scientific data. There are a bunch of projects to pick, from working on climate change, to cancer, to the Large Hadron Collider.
The good folks at linuxserver.io even have a ready to go Docker container for easy setup: https://hub.docker.com/r/linuxserver/boinc
Another possibility is running the Archive Team’s Warrior, which downloads data from at risk web sites and uploads them to the Internet Archive: https://wiki.archiveteam.org/index.php/ArchiveTeam_Warrior
Does anyone else have examples of projects like this? My dream is for the Fediverse to have this sort of feature eventually.
Now I know this is being done with encryption, but an open tunnel direct to your non dmz-ed system, is just begging to be hacked, and it will be, without a shadow of doubt.
In what sense is this "opening a direct tunnel?"
I don't think you really understand what's going on here; or otherwise, I don't.
I've used BOINC without issue for over a decade.
As far as I know, the BOINC client just pulls down new data for processing when each batch of work is done. There's no pushing and no open tunnel or port. The software risk would be malicious code in a particular project (e.g. if it said it was folding proteins but actually mined bitcoins). I hope there's some vetting of project code.
The other risk is hardware (especially CPU and RAM) running its lifetime down more quickly because of the continual heavier usage.