dns

MXmap is an open-source tool that visualizes which email providers handle official email services across Switzerland's 2,100 municipalities, highlighting digital sovereignty concerns around US-based providers subject to the CLOUD Act.

Pi-hole is a network-wide DNS sinkhole that blocks ads and unwanted content across all devices on a network without client-side software. It runs on Linux hardware, supports IPv4/IPv6, and can also function as a DHCP server.