Gudgeon is a caching/blocking DNS proxy server. What sets Gudgeon apart is the ability to segregate machines, subnets, and IP ranges into different groups that all receive different blocking rules. The motivation for Gudgeon comes from the proliferation of devices on my home network that belong either to outside entities (Google, AT&T, Amazon), kids, or unwise adults. Different groups, classes of user, and devices need different blocking rules.
Take, for example, a user who has shown persistent inability to avoid internet scams. You can assign that user's machine(s) to group(s) that block more suspicious DNS requests. On the other hand you might want to allow a device like a Google Home or Alexa unit to have full access to the internet except for tracking/advert websites. You might want to create extensive blocklists to protect kids who use the internet from their devices.
For all of these reasons Gudgeon has been created to allow more flexibility in host-based DNS blocking.
Description
openBalena VPN augments an OpenVPN server with the following components/features:
open-balena-connect-proxy is a http connect proxy that handles connections through the vpn to services on connected devices, used by external services such as balena-proxy
open-balena-vpn-api which consists of an internal API for handling authentication and tracking device state, and spawns openvpn server instances
haproxy used for balancing new connections between openvpn instances
libnss-openvpn is used to handle dns lookups of devices for connections via open-balena-connect-proxy