The so-called Tor (or onion) network is a way to get better anonymity in the web by hiding your IP address. A really nice option is to use the Raspberry Pi to open a new WLAN network and act as a gateway into the Tor network. All traffic from the devices connected to this WLAN will be routed through the Tor network.
Tor
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Using a cheap Raspberry Pi it's quite easy for someone with some general linux knowledge to set up an own nextcloud server which is available on the Tor network.
If you care about privacy and freedom on the internet you should consider using and supporting Tor. If you have internet bandwidth to share you could easily support the Tor network by running a Tor Relay.
